/* ============================================
   桃花公益 · 官网重构 v5 · 极简高级感
   设计原则：大量留白、低饱和色彩、细腻质感、克制装饰
   ============================================ */

:root {
  /* === 色彩系统（暖调高级感） === */
  --bg: #FFFFFF;
  --bg-warm: #FAF8F5;
  --bg-mute: #F4F1EC;
  --bg-dark: #2B2724;
  
  --ink: #1D1A17;
  --ink-2: #4A4540;
  --muted: #8A847D;
  --muted-2: #B5AFA7;
  
  --primary: #B08080;
  --primary-dark: #8E6464;
  --primary-deep: #8E6464;
  --primary-soft: #F5EDED;
  --primary-tint: #FAF4F4;
  --primary-light: #F5EDED;
  
  --border: #EAE5DF;
  --border-soft: #F0EBE5;
  
  /* === 阴影（极细腻） === */
  --shadow-xs: 0 1px 2px rgba(28, 23, 20, 0.03);
  --shadow-sm: 0 1px 3px rgba(28, 23, 20, 0.04), 0 4px 12px rgba(28, 23, 20, 0.03);
  --shadow-md: 0 2px 8px rgba(28, 23, 20, 0.04), 0 12px 32px rgba(28, 23, 20, 0.05);
  
  /* === 圆角（克制） === */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  
  /* === 间距 === */
  --section-y: clamp(80px, 10vw, 140px);
  --container: 1200px;
  
  /* === 字体 === */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  
  /* === 过渡 === */
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --dur: 0.4s;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--bg);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--primary); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

/* ========== 排版 ========== */
.display {
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.h3 {
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
}
.lead {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  line-height: 1.7;
  color: var(--ink-2);
  font-weight: 400;
}
.eyebrow {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 1rem;
}
.caption {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }
.mb-6 { margin-bottom: 4rem; }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--r-md);
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
}
.btn-ghost:hover {
  color: var(--primary);
  background: var(--primary-tint);
}
.btn-lg {
  padding: 1rem 2.2rem;
  font-size: 1rem;
  border-radius: var(--r-md);
}

/* ========== Header ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--dur) var(--ease);
}
.header.scrolled {
  background: rgba(255,255,255,0.96);
  border-bottom-color: var(--border-soft);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.logo img {
  height: 32px;
  width: auto;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
.logo-text { line-height: 1.2; }
.logo-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.logo-sub {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0;
}
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav a {
  font-size: 0.88rem;
  color: var(--ink-2);
  font-weight: 400;
  position: relative;
}
.nav a.active { color: var(--ink); font-weight: 500; }
.nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--primary);
  border-radius: 1px;
}
.nav .btn { margin-left: 0.5rem; }
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  border-radius: var(--r-sm);
}
.menu-toggle:hover { background: var(--bg-warm); }
.mobile-menu {
  display: none;
  padding: 1rem 0 1.5rem;
  border-top: 1px solid var(--border-soft);
}
.mobile-menu a {
  display: block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  color: var(--ink-2);
}
.mobile-menu a.active { color: var(--primary); font-weight: 500; }

/* ========== Section 基础 ========== */
.section {
  padding: var(--section-y) 0;
}
.section-warm { background: var(--bg-warm); }
.section-mute { background: var(--bg-mute); }
.section-dark { background: var(--bg-dark); color: rgba(255,255,255,0.8); }
.section-dark .h2, .section-dark .h3 { color: #fff; }

/* ========== Hero（首页通栏大视觉） ========== */
.hero {
  padding-top: calc(68px + clamp(80px, 10vw, 140px));
  padding-bottom: clamp(80px, 10vw, 140px);
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--primary-tint) 0%, var(--bg) 70%);
}
/* 背景微妙暖晕 */
.hero::before {
  content: '';
  position: absolute;
  top: -300px;
  right: -15%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(176,128,128,0.10) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -300px;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(176,128,128,0.06) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(48px, 7vw, 100px);
  align-items: center;
}
.hero-text .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  background: var(--primary-soft);
  color: var(--primary-dark);
  border-radius: 100px;
  margin-bottom: 2rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}
.hero-text .eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.hero-text h1 {
  margin-bottom: 1.8rem;
}
.hero-text h1 span {
  color: var(--primary);
  font-weight: 400;
}
.hero-text .lead {
  margin-bottom: 2.8rem;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}
.hero-img {
  position: relative;
  border-radius: var(--r-xl);
  overflow: hidden;
  aspect-ratio: 4/5;
  box-shadow: 0 8px 40px rgba(176,128,128,0.12), 0 32px 80px rgba(28,23,20,0.12);
}
.hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}
.hero-img:hover img {
  transform: scale(1.04);
}
.hero-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.08) 100%);
  pointer-events: none;
}
.hero-note {
  margin-top: 1.8rem;
  display: flex;
  gap: 1.8rem;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: var(--muted);
}
.hero-note span {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.hero-note svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* ========== 数据条 ========== */
.stats {
  padding: clamp(40px, 5vw, 60px) 0;
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: center;
}
.stat-num {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 300;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}
.stat-num .unit {
  font-size: 0.5em;
  color: var(--muted);
  font-weight: 400;
  margin-left: 0.1em;
}
.stat-label {
  font-size: 0.88rem;
  color: var(--muted);
}
.stat-source {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.78rem;
  color: var(--muted-2);
}

/* ========== 引言区块 ========== */
.manifesto {
  padding: clamp(80px, 12vw, 140px) 0;
  text-align: center;
}
.manifesto-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink);
  max-width: 780px;
  margin: 0 auto 1.5rem;
  letter-spacing: -0.01em;
}
.manifesto-attr {
  font-size: 0.88rem;
  color: var(--muted);
}

/* ========== 步骤：左右图文交替 ========== */
.steps {
  padding: var(--section-y) 0;
}
.step-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 7vw, 100px);
  align-items: center;
  margin-bottom: clamp(60px, 8vw, 120px);
}
.step-row:last-child { margin-bottom: 0; }
.step-row.reverse .step-img { order: 2; }
.step-num {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 0.8rem;
}
.step-row h3 {
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.step-row p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-2);
  max-width: 440px;
}
.step-img {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: var(--shadow-sm);
}
.step-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.step-img:hover img { transform: scale(1.03); }

/* ========== 权益卡片网格 ========== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.benefit-card {
  background: var(--bg);
  padding: 2.5rem 2rem;
  transition: background var(--dur) var(--ease);
}
.benefit-card:hover { background: var(--bg-warm); }
.benefit-icon {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--primary);
  margin-bottom: 1.4rem;
  letter-spacing: 0.02em;
  opacity: 0.7;
}
.benefit-card h3 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.6rem;
}
.benefit-card p {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ========== 大图场景 ========== */
.showcase {
  padding: var(--section-y) 0;
}
.showcase-img {
  border-radius: var(--r-xl);
  overflow: hidden;
  aspect-ratio: 21/9;
  margin-bottom: 3rem;
  box-shadow: var(--shadow-md);
}
.showcase-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.showcase-text {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}
.showcase-text p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ========== 申请卡片 ========== */
.apply-card {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  padding: clamp(40px, 6vw, 64px) clamp(28px, 5vw, 56px);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
}
.apply-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  margin: 2rem 0 2.2rem;
}
.apply-feat {
  background: var(--bg-warm);
  padding: 1.3rem 1rem;
  text-align: left;
}
.apply-feat strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.2rem;
}
.apply-feat span {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ========== 深色承诺 ========== */
.promises {
  padding: var(--section-y) 0;
}
.promises-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-top: 3rem;
}
.promise-card {
  background: rgba(255,255,255,0.03);
  padding: 2.5rem 2rem;
  transition: background var(--dur) var(--ease);
}
.promise-card:hover { background: rgba(255,255,255,0.06); }
.promise-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 1rem;
  opacity: 0.7;
}
.promise-card h3 {
  font-size: 1.15rem;
  font-weight: 500;
  color: #fff;
  margin-bottom: 0.6rem;
}
.promise-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
}

/* ========== CTA 最终行动 ========== */
.cta-final {
  padding: clamp(80px, 10vw, 120px) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, var(--primary-tint) 100%);
}
.cta-final .h2 { margin-bottom: 1rem; }
.cta-final p {
  font-size: 1.05rem;
  color: var(--ink-2);
  margin-bottom: 2.2rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== Section 描述文字 ========== */
.section-desc {
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.75;
  color: var(--muted);
  max-width: 560px;
  margin: 0.8rem auto 0;
}

/* ========== Nav CTA 按钮 ========== */
.nav .nav-cta {
  margin-left: 0.5rem;
  padding: 0.6rem 1.3rem;
  font-size: 0.85rem;
}

/* ========== AI搭档 区块 ========== */
.ai-buddy-grid {
  grid-template-columns: 1fr 1fr;
  gap: clamp(48px, 7vw, 90px);
  align-items: center;
}
.ai-buddy-text { order: 2; }
.ai-buddy-img { order: 1; }
.ai-buddy-lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--ink-2);
  margin-bottom: 2rem;
}
.ai-feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.ai-feature-list li {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--ink-2);
}
.ai-feature-list strong {
  color: var(--ink);
  font-weight: 600;
}
.ai-feat-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  font-size: 0.78rem;
  font-weight: 600;
}
.ai-buddy-img {
  aspect-ratio: 4/5;
}

/* ========== FAQ ========== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.faq-item {
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  background: var(--bg);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.faq-item[open] {
  border-color: var(--primary-soft);
  box-shadow: var(--shadow-xs);
}
.faq-item summary {
  padding: 1.25rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
  transition: color var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--muted);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
  flex-shrink: 0;
  margin-left: 1rem;
  line-height: 1;
}
.faq-item[open] summary {
  color: var(--primary);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--primary);
}
.faq-item p {
  padding: 0 1.5rem 1.4rem;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-2);
  margin: 0;
}
.faq-item strong {
  color: var(--ink);
}
.faq-item a {
  color: var(--primary);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}
.faq-item a:hover {
  border-bottom-color: var(--primary);
}
/* FAQ 问题/答案文本：内边距留对，文字不贴边 */
.faq-item .faq-q {
  padding: 1.25rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  line-height: 1.5;
}
.faq-item .faq-q .chev {
  color: var(--muted);
  flex-shrink: 0;
  display: inline-flex;
}
.faq-item .faq-a .faq-a-inner {
  padding: 0 1.5rem 1.4rem;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-2);
}
/* FAQ 展开/收起 */
.faq-item .faq-q {
  cursor: pointer;
  user-select: none;
}
.faq-item .faq-q .chev {
  transition: transform 0.3s var(--ease);
}
.faq-item .faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.32s var(--ease);
}
.faq-item .faq-a-inner {
  overflow: hidden;
  min-height: 0;
}
.faq-item.open .faq-a {
  grid-template-rows: 1fr;
}
.faq-item.open .faq-q .chev {
  transform: rotate(180deg);
}

/* ========== Apply 描述 ========== */
.apply-desc {
  max-width: 480px;
  margin: 0 auto 1.5rem;
  color: var(--muted);
}

/* ========== Manifesto 增强 ========== */
.manifesto-inner {
  max-width: 780px;
  margin: 0 auto;
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.65);
  padding: clamp(50px, 7vw, 80px) 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: clamp(40px, 5vw, 60px);
}
.footer-brand .logo {
  margin-bottom: 1.2rem;
}
.footer-brand .logo img {
  height: 36px;
  width: auto;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
.footer-brand .logo-title { color: #fff; }
.footer-brand .logo-sub { color: rgba(255,255,255,0.4); }
.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  max-width: 320px;
  margin-bottom: 1.2rem;
}
.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.2rem;
}
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  padding: 0.3rem 0;
  transition: color var(--dur) var(--ease);
}
.footer-col a:hover { color: #fff; }
.footer-contact {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0;
  font-size: 0.9rem;
}
.footer-contact .fc-icon {
  color: rgba(255,255,255,0.3);
  flex: none;
  margin-top: 2px;
}
.footer-contact .fc-icon svg { width: 18px; height: 18px; }
.footer-contact .fc-label {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
  display: block;
}
.footer-contact .fc-value {
  color: rgba(255,255,255,0.75);
  cursor: pointer;
  text-decoration: none;
  transition: color .2s ease;
}
.footer-contact a.fc-value:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* ========== 下载中心：桌面客户端卡片 ========== */
.dl-card { display: flex; flex-direction: column; }
.dl-platform {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1.1rem;
}
.dl-badge {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.dl-os {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.3;
}
.dl-product {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 0.15rem;
}
.dl-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
  padding: 0.7rem 0;
  margin-bottom: 1rem;
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.82rem;
  color: var(--muted);
}
.dl-btn { width: 100%; justify-content: center; }
.dl-btn.is-pending {
  background: var(--bg-mute);
  color: var(--muted);
  pointer-events: none;
  box-shadow: none;
}
.dl-state {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.6;
  margin: 0.7rem 0 0;
}
.dl-state.ok { color: var(--primary-dark); }
.dl-req {
  font-size: 0.8rem;
  color: var(--muted-2);
  margin: 0.35rem 0 0;
}

/* ========== 悬浮按钮（首页隐藏，保持其他页面兼容） ========== */
.float-btn { display: none !important; }

/* ========== 滚动显现 ========== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
/* 首屏hero区元素默认可见，避免IO初始化延迟导致闪烁 */
body.home .hero .reveal {
  opacity: 1;
  transform: none;
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ========== 响应式 ========== */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-img { max-width: 480px; margin: 0 auto; aspect-ratio: 3/2; }
  .ai-buddy-grid { grid-template-columns: 1fr; }
  .ai-buddy-text { order: 1; }
  .ai-buddy-img { order: 2; max-width: 480px; margin: 0 auto; aspect-ratio: 3/2; }
  .step-row, .step-row.reverse {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .step-row.reverse .step-img { order: 0; }
  .step-row p { max-width: 100%; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .promises-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }
  .mobile-menu.open { display: block; }
  .hero-note { gap: 1rem; }
  .stats-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .apply-features { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .showcase-img { aspect-ratio: 4/3; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ========== 非首页hero：不用渐变背景 ========== */
body:not(.home) .hero {
  background: var(--bg);
  padding-top: clamp(40px, 6vw, 70px);
  padding-bottom: clamp(40px, 6vw, 60px);
}
body:not(.home) .hero::before,
body:not(.home) .hero::after { display: none; }

/* ========== 非首页：sticky header不需要额外padding ========== */
body:not(.home) { padding-top: 0; }
body:not(.home) .hero { padding-top: clamp(60px, 8vw, 100px); }

/* ========== 旧页面兼容样式 ========== */
.hero-solo { padding-bottom: clamp(40px, 6vw, 60px); }
.hero-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 60px);
  align-items: center;
}
@media (min-width: 768px) {
  .hero-split { grid-template-columns: 1fr 1fr; }
  .hero-split.reverse { direction: rtl; }
  .hero-split.reverse > * { direction: ltr; }
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--primary-soft);
  color: var(--primary-dark);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}
.hero-tag .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--primary);
}
.hero-title {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 1.2rem;
}
.hero-title .grad, .grad {
  color: var(--primary);
  font-weight: 400;
}
.hero-desc, .section-subtitle, .card-text {
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  line-height: 1.7;
  color: var(--ink-2);
  margin-bottom: 1rem;
}
.hero-trust {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.section-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 500;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 0.8rem;
}
.eyebrow-center {
  text-align: center;
  display: block;
}
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 2rem;
  transition: all var(--dur) var(--ease);
}
.card:hover { box-shadow: var(--shadow-sm); }
.icon-box {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-tint);
  color: var(--primary-dark);
  border-radius: var(--r-sm);
  margin-bottom: 1.2rem;
}
.icon-box svg { width: 22px; height: 22px; }
.card-title {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.6rem;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.grid-3-row3 {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 900px) {
  .grid-3-row3 { grid-template-columns: 1fr; }
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.grid-4 .card { text-align: center; }
.grid-4 .card .icon-box { margin-left: auto; margin-right: auto; }
.grid-4 .card p, .grid-4 .card .card-title { text-align: center; }
/* 八大能力卡片：加大并美化图标 */
.grid-4 .card .icon-box {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, #FEF6F7 0%, #FCECEE 100%);
  color: var(--primary-dark);
  box-shadow: 0 6px 16px rgba(185,120,130,0.10);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.grid-4 .card .icon-box:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(185,120,130,0.16);
}
.grid-4 .card .icon-box svg { width: 34px; height: 34px; stroke-width: 2.1; }
/* products.html 八大能力卡片：白色简约风（2026-09-01 需求：细线 + 白底无边框，去粉色渐变） */
.features-grid .grid-4 .card {
  border-color: var(--border-soft);
}
.features-grid .grid-4 .card .icon-box {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 2px 10px rgba(60, 40, 45, 0.06);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.features-grid .grid-4 .card .icon-box:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(185,120,130,0.14);
}
.features-grid .grid-4 .card .icon-box svg {
  width: 30px;
  height: 30px;
  stroke-width: 1.5;
}
@media (max-width: 900px) {
  .features-grid .grid-4 .card .icon-box { width: 54px; height: 54px; }
  .features-grid .grid-4 .card .icon-box svg { width: 26px; height: 26px; }
}
@media (max-width: 900px) {
  .grid-4 .card .icon-box { width: 58px; height: 58px; }
  .grid-4 .card .icon-box svg { width: 30px; height: 30px; }
}
@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
.banner-wrap {
  position: relative;
  margin: 0 0 clamp(40px,6vw,80px) 0;
}
.page-banner {
  position: relative;
  border-radius: 0;
  overflow: hidden;
  aspect-ratio: 21/9;
  margin: 0 calc(-50vw + 50%);
  width: 100vw;
  max-width: 100vw;
}
.page-banner img { width: 100%; height: 100%; object-fit: cover; }
.banner-shade {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.55) 100%);
}
.banner-cap {
  position: absolute;
  left: clamp(20px,4vw,48px);
  right: clamp(20px,4vw,48px);
  bottom: clamp(20px,4vw,40px);
  color: #fff;
}
.banner-chip {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 100px;
  font-size: 0.78rem;
  margin-bottom: 0.8rem;
}
.banner-sub { font-size: 0.9rem; opacity: 0.85; max-width: 520px; }
.timeline { position: relative; padding-left: 1.5rem; }
.timeline::before {
  content: ''; position: absolute; left: 5px; top: 8px; bottom: 8px;
  width: 1px; background: var(--border);
}
.tl-item { position: relative; padding-bottom: 1.8rem; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute; left: -1.5rem; top: 6px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--primary);
}
.tl-year { font-size: 0.8rem; color: var(--primary); font-weight: 500; letter-spacing: 0.05em; }
.tl-title { font-size: 1.05rem; font-weight: 500; color: var(--ink); margin: 0.2rem 0 0.3rem; }
.tl-text { font-size: 0.9rem; color: var(--muted); line-height: 1.65; }
.badge-soft {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  background: var(--primary-tint);
  color: var(--primary-dark);
  border: 1px solid var(--primary-soft);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
}
.form-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 2.5rem;
  margin-top: 1.5rem;
}
.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 640px) { .form-grid-2 { grid-template-columns: 1fr; } }
.form-row { margin-bottom: 1.1rem; }
.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-2);
  margin-bottom: 0.4rem;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.92rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: border-color var(--dur) var(--ease);
  outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-error { display: none; font-size: 0.78rem; color: #c05050; margin-top: 0.3rem; }
.form-error.show { display: block; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-3 { gap: 0.75rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.text-center { text-align: center; }
.success-wrap { text-align: center; padding: 1rem; }
.success-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: #E8F4EC; color: #4A9B66;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1rem;
}
.list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.list-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: all var(--dur) var(--ease);
}
.list-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.list-card-img { aspect-ratio: 16/10; overflow: hidden; }
.list-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.list-card:hover .list-card-img img { transform: scale(1.03); }
.list-card-body { padding: 1.5rem; }
.list-card-tag {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--primary);
  background: var(--primary-tint);
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  margin-bottom: 0.8rem;
  letter-spacing: 0.05em;
}
.apply-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: clamp(2rem,5vw,3.5rem);
  box-shadow: var(--shadow-sm);
}
.apply-card-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(30px,5vw,60px);
  align-items: center;
}
.apply-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}
.apply-feat {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 0.92rem; color: var(--ink-2);
}
.apply-feat svg { width: 18px; height: 18px; color: var(--primary); flex-shrink: 0; }
.status-card {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
  padding: 3rem 2rem;
}
.status-icon {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--primary-tint); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1.5rem;
}
.status-icon svg { width: 32px; height: 32px; }
.footer { background: var(--bg-dark); }
.section-sand { background: var(--bg-warm); }

/* ========== 核心能力 · 通栏Banner ========== */
.section-capabilities { padding-bottom: 0; }
.cap-banner {
  position: relative;
  margin-bottom: clamp(40px, 6vw, 80px);
}
.cap-banner:last-child { margin-bottom: clamp(60px, 8vw, 120px); }
.cap-banner-img {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.cap-banner-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 1.2s var(--ease);
}
.cap-banner:hover .cap-banner-img img { transform: scale(1.03); }
.cap-banner-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(29,26,23,0.65) 0%, rgba(29,26,23,0.3) 50%, transparent 100%);
}
.cap-banner.reverse .cap-banner-shade {
  background: linear-gradient(-90deg, rgba(29,26,23,0.65) 0%, rgba(29,26,23,0.3) 50%, transparent 100%);
}
.cap-banner-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
}
.cap-banner.reverse .cap-banner-content {
  justify-content: flex-end;
}
.cap-banner-text {
  max-width: 480px;
  color: #fff;
  padding: 0;
}
.cap-banner-text .step-num {
  color: rgba(255,255,255,0.7);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  margin-bottom: 0.9rem;
}
.cap-banner-text h3 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 500;
  color: #fff;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.cap-banner-text p {
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.85);
  max-width: 440px;
}

@media (max-width: 768px) {
  .cap-banner-img { aspect-ratio: 4/5; }
  .cap-banner-shade,
  .cap-banner.reverse .cap-banner-shade {
    background: linear-gradient(180deg, transparent 30%, rgba(29,26,23,0.75) 100%);
  }
  .cap-banner-content,
  .cap-banner.reverse .cap-banner-content {
    align-items: flex-end;
    justify-content: flex-start;
  }
  .cap-banner-text {
    max-width: 100%;
    padding-bottom: clamp(24px, 5vw, 40px);
  }
  .cap-banner-text h3 { font-size: 1.4rem; }
}

/* ============================================
   沉浸式大气版 · v6
   ============================================ */

/* --- 透明导航（Hero上方） --- */
.header-transparent {
  position: absolute !important;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.15) 60%, transparent 100%) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border-bottom: 1px solid rgba(255,255,255,0.08) !important;
  box-shadow: none !important;
  transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.header-transparent .logo-title { color: #fff !important; }
.header-transparent .logo-sub { color: rgba(255,255,255,0.7) !important; }
.header-transparent .nav a { color: rgba(255,255,255,0.88) !important; }
.header-transparent .nav a:hover { color: #fff !important; }
.header-transparent .nav a.active { color: #fff !important; }
.header-transparent .nav a.active::after { background: #fff !important; }
.header-transparent .menu-toggle { color: #fff !important; }
.header-transparent .nav-cta.btn-primary {
  background: rgba(255,255,255,0.15) !important;
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.3) !important;
  color: #fff !important;
}
.header-transparent .nav-cta.btn-primary:hover {
  background: rgba(255,255,255,0.28) !important;
  transform: translateY(-1px);
}
.header-transparent.header-scrolled {
  position: fixed !important;
  background: rgba(255,255,255,0.92) !important;
  backdrop-filter: saturate(180%) blur(20px) !important;
  -webkit-backdrop-filter: saturate(180%) blur(20px) !important;
  border-bottom-color: var(--border) !important;
  box-shadow: 0 1px 12px rgba(0,0,0,0.06) !important;
}
.header-transparent.header-scrolled .logo-title { color: var(--ink) !important; }
.header-transparent.header-scrolled .logo-sub { color: var(--muted) !important; }
.header-transparent.header-scrolled .nav a { color: var(--ink-2) !important; }
.header-transparent.header-scrolled .nav a:hover { color: var(--primary) !important; }
.header-transparent.header-scrolled .nav a.active { color: var(--primary) !important; }
.header-transparent.header-scrolled .nav a.active::after { background: var(--primary) !important; }
.header-transparent.header-scrolled .menu-toggle { color: var(--ink) !important; }
.header-transparent.header-scrolled .nav-cta.btn-primary {
  background: var(--primary) !important;
  border-color: var(--primary) !important;
  color: #fff !important;
}
.header-transparent.header-scrolled .nav-cta.btn-primary:hover {
  background: var(--primary-dark) !important;
}

/* --- 沉浸式Hero --- */
.hero-immersive {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-immersive-bg {
  position: absolute;
  inset: 0;
}
.hero-immersive-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-immersive-overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 45%, rgba(40,30,50,0.15) 0%, transparent 70%),
    linear-gradient(
      180deg,
      rgba(29,26,23,0.35) 0%,
      rgba(29,26,23,0.25) 40%,
      rgba(29,26,23,0.65) 100%
    );
}
.hero-immersive-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: 100px;
  padding-bottom: 80px;
}
.hero-eyebrow {
  display: inline-block;
  padding: 0.4rem 1.1rem;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  color: rgba(255,255,255,0.9);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
}
.hero-immersive-title {
  font-size: clamp(2.6rem, 6.5vw, 5rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 1.5rem;
}
.hero-immersive-title .hero-accent {
  background: linear-gradient(135deg, #E8C5C5 0%, #C9A0A0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 400;
}
.hero-immersive-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.7;
  color: rgba(255,255,255,0.82);
  margin-bottom: 2.8rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero-immersive-actions {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.5);
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
  50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* --- 白色按钮 & 幽灵按钮 --- */
.btn-white {
  background: #fff;
  color: var(--ink);
  border: 1px solid #fff;
  font-weight: 500;
  transition: all var(--dur) var(--ease);
}
.btn-white:hover {
  background: rgba(255,255,255,0.9);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  color: var(--ink);
}
.btn-ghost-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
  font-weight: 500;
  transition: all var(--dur) var(--ease);
}
.btn-ghost-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
  color: #fff;
}
.btn-outline-white {
  background: var(--primary-tint);
  color: var(--primary-dark);
  border: 1.5px solid var(--primary);
  font-weight: 500;
  transition: all var(--dur) var(--ease);
}
.btn-outline-white:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
/* 白色 CTA 区块内：主按钮用主色实心底，白色背景上清晰可见 */
.cta-bg .btn-white {
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.cta-bg .btn-white:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(139, 84, 84, 0.28);
}

/* --- 数据条（沉浸式下贴在Hero底部或独立） --- */
.stats-immersive {
  background: var(--bg-dark);
  padding: clamp(2rem, 4vw, 3rem) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.stats-immersive .stats-grid {
  grid-template-columns: repeat(4, 1fr);
}
.stats-immersive .stat-num {
  color: #fff;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
}
.stats-immersive .stat-label {
  color: rgba(255,255,255,0.55);
}

/* --- section 通用 header --- */
.section-header {
  margin-bottom: clamp(40px, 6vw, 70px);
}
.section-header.text-center { text-align: center; }
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: var(--primary-tint);
  color: var(--primary-dark);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.section-eyebrow::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--primary);
}
.section-eyebrow-light {
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.8);
}
.section-eyebrow-light::before { background: rgba(255,255,255,0.5); }
.section-title-large {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.2;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.25;
}
.section-title-light { color: #fff; }

/* --- 核心能力Banner增强 --- */
.section-capabilities-immersive {
  padding-top: clamp(60px, 8vw, 100px);
}
.cap-banner-immersive {
  margin-bottom: clamp(24px, 4vw, 40px);
}
.cap-banner-immersive .cap-banner-img {
  aspect-ratio: 2.4/1;
  max-height: 65vh;
}
.cap-banner-gradient {
  background: linear-gradient(135deg, #1C1612 0%, #2A1F1A 30%, #3D2A25 60%, #4A2F2E 100%);
  position: relative;
  overflow: hidden;
}
.cap-banner-bg-abstract {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.abstract-icon {
  width: 280px;
  height: 280px;
  opacity: 0.6;
  position: relative;
  z-index: 1;
  animation: abstract-pulse 4s ease-in-out infinite;
}
@keyframes abstract-pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.75; transform: scale(1.03); }
}
.abstract-dot {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200,140,150,0.2) 0%, transparent 70%);
}
.abstract-dot.d1 { width: 320px; height: 320px; top: -80px; right: -60px; }
.abstract-dot.d2 { width: 200px; height: 200px; bottom: -40px; left: 12%; background: radial-gradient(circle, rgba(180,120,130,0.15) 0%, transparent 70%); }
.abstract-dot.d3 { width: 120px; height: 120px; top: 25%; left: 8%; background: radial-gradient(circle, rgba(220,180,160,0.12) 0%, transparent 70%); }
.abstract-dot.d4 { width: 80px; height: 80px; bottom: 20%; right: 20%; background: radial-gradient(circle, rgba(200,150,160,0.18) 0%, transparent 70%); }
.cap-banner-num {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.8rem;
}
.cap-banner-immersive .cap-banner-text h3 {
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 500;
  margin-bottom: 0.8rem;
}
.cap-banner-immersive .cap-banner-text p {
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
  line-height: 1.75;
}

/* --- 三层体系：并排卡片（tier-card） --- */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 2vw, 1.75rem);
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}
.tier-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--dur) var(--ease);
}
.tier-card:hover {
  border-color: var(--primary-soft);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.tier-card-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  flex-shrink: 0;
}
.tier-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 1.2s var(--ease);
}
.tier-card:hover .tier-card-media img { transform: scale(1.04); }
.tier-card-media-grad {
  background: linear-gradient(135deg, #1C1612 0%, #2A1F1A 35%, #3D2A25 70%, #4A2F2E 100%);
}
.tier-card-media-grad .cap-banner-bg-abstract {
  position: absolute;
  inset: 0;
}
.tier-card-body {
  padding: clamp(1.4rem, 2vw, 1.8rem) clamp(1.4rem, 2vw, 1.8rem) clamp(2.2rem, 3vw, 2.8rem);
}
.tier-card-num {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--primary);
  background: var(--primary-tint);
  display: inline-block;
  padding: 0.28rem 0.7rem;
  border-radius: 100px;
  margin-bottom: 1rem;
}
.tier-card-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.6rem;
}
.tier-card-body p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}
@media (max-width: 900px) {
  .tier-grid { grid-template-columns: 1fr; }
}

/* --- 适用人群网格 --- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.audience-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.8rem 1.5rem;
  transition: all var(--dur) var(--ease);
}
.audience-item:hover {
  border-color: var(--primary-soft);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.audience-item h3 {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.5rem;
}
.audience-item p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
}

/* --- 深色承诺区块 --- */
.section-dark-immersive {
  padding: clamp(60px, 8vw, 100px) 0;
}
.promises-compact {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: clamp(30px, 5vw, 50px);
}
.promise-item {
  text-align: center;
  padding: 0 2rem;
  position: relative;
}
.promise-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 10%;
  bottom: 10%;
  width: 1px;
  background: rgba(255,255,255,0.08);
}
.promise-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: rgba(255,255,255,0.25);
  margin-bottom: 1rem;
}
.promise-item h3 {
  font-size: 1.1rem;
  font-weight: 500;
  color: #fff;
  margin-bottom: 0.6rem;
}
.promise-item p {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.65;
  margin: 0;
}

/* --- 最终CTA --- */
.cta-final-immersive {
  text-align: center;
  padding: clamp(80px, 12vw, 140px) 0;
  background: linear-gradient(180deg, var(--bg-warm) 0%, #fff 100%);
}
.cta-title-large {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 1.2rem;
}
.cta-sub {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
}
.btn-cta-xl {
  padding: 1rem 2.8rem;
  font-size: 1.05rem;
}

/* --- 内页固定导航（白色） --- */
.header-inner-page {
  position: sticky !important;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.94) !important;
  backdrop-filter: saturate(180%) blur(20px) !important;
  -webkit-backdrop-filter: saturate(180%) blur(20px) !important;
  border-bottom: 1px solid var(--border) !important;
  box-shadow: none;
  transition: box-shadow 0.3s var(--ease);
}
.header-inner-page.header-scrolled {
  box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}
.header-inner-page .logo-title { color: var(--ink) !important; }
.header-inner-page .logo-sub { color: var(--muted) !important; }
.header-inner-page .nav a { color: var(--ink-2) !important; }
.header-inner-page .nav a:hover { color: var(--primary) !important; }
.header-inner-page .nav a.active { color: var(--primary) !important; }
.header-inner-page .nav a.active::after { background: var(--primary) !important; }
.header-inner-page .nav-cta.btn-primary {
  background: var(--primary) !important;
  border-color: var(--primary) !important;
  color: #fff !important;
  padding: .65rem 1.3rem !important;
  font-size: .85rem !important;
}
.header-inner-page .menu-toggle { color: var(--ink) !important; }

/* --- 内页沉浸式Hero（banner图第一屏） --- */
.page-hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #1A1714;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.page-hero-dashboard .page-hero-bg {
  filter: blur(12px) brightness(0.28) saturate(0.6);
  transform: scale(1.12);
}
.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(20,16,14,0.35) 0%,
    rgba(20,16,14,0.5) 45%,
    rgba(20,16,14,0.72) 100%
  );
  z-index: 1;
}
.page-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: 100px;
  padding-bottom: 70px;
  color: #fff;
  max-width: 780px;
  margin: 0 auto;
}
.page-hero-content .hero-tag {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .4rem 1rem;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  color: rgba(255,255,255,0.9);
  font-size: .78rem;
  font-weight: 500;
  margin-bottom: 1.4rem;
}
.page-hero-content .hero-tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.8);
}
.page-hero-content h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 1rem;
  color: #fff;
  letter-spacing: -0.02em;
}
.page-hero-content h1 .grad {
  background: linear-gradient(135deg, rgba(255,255,255,1) 0%, rgba(255,255,255,0.65) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-hero-content .hero-desc {
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.82);
  max-width: 560px;
  margin: 0 auto 2rem;
}
.page-hero-actions {
  display: flex;
  gap: .8rem;
  justify-content: center;
  flex-wrap: wrap;
}
.page-hero-actions .btn-primary {
  background: #fff !important;
  color: var(--primary-dark) !important;
  border-color: #fff !important;
  font-weight: 700 !important;
}
.page-hero-actions .btn-primary:hover {
  background: rgba(255,255,255,0.92) !important;
  color: var(--primary-dark) !important;
  transform: translateY(-1px);
}
.page-hero-actions .btn-ghost {
  background: rgba(255,255,255,0.12) !important;
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.28) !important;
  color: #fff !important;
}
.page-hero-actions .btn-ghost:hover {
  background: rgba(255,255,255,0.22) !important;
}
.page-hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  margin-top: 1.8rem;
  font-size: .82rem;
  color: rgba(255,255,255,0.65);
}
.page-hero-trust svg { flex-shrink: 0; color: rgba(255,255,255,0.7); }
.page-hero-trust a { color: rgba(255,255,255,0.85); font-weight: 600; }
.page-hero-trust a:hover { color: #fff; }

/* cases页面的第一屏全屏city slider */
.banner-hero {
  position: relative;
  min-height: 85vh;
  margin: 0;
  display: flex;
  align-items: center;
}
.banner-hero .page-banner {
  position: absolute;
  inset: 0;
  aspect-ratio: auto;
  width: 100%;
  height: 100%;
  margin: 0;
  border-radius: 0;
}
.banner-hero .page-banner img,
.banner-hero .city-slider-imgs img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.banner-hero .page-banner .banner-shade {
  background: linear-gradient(
    180deg,
    rgba(20,16,14,0.3) 0%,
    rgba(20,16,14,0.4) 50%,
    rgba(20,16,14,0.72) 100%
  );
}
.banner-hero .banner-cap {
  position: relative;
  z-index: 3;
  inset: auto;
  text-align: center;
  left: 0;
  right: 0;
  bottom: auto;
  padding-top: 100px;
  padding-bottom: 80px;
  max-width: 780px;
  margin: 0 auto;
}
.banner-hero .banner-chip {
  margin-bottom: 1.2rem;
}
.banner-hero .banner-cap h2 {
  font-size: clamp(2rem, 4.5vw, 3.2rem) !important;
  font-weight: 700 !important;
  line-height: 1.2 !important;
  letter-spacing: -0.02em;
  margin-bottom: 1rem !important;
}
.banner-hero .banner-sub {
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.82);
  max-width: 560px;
  margin: 0 auto 2rem;
}
.banner-hero .city-dots {
  bottom: clamp(24px, 3vw, 40px);
}

/* --- 响应式 --- */
@media (max-width: 768px) {
  .page-hero { min-height: 75vh; }
  .page-hero-content { padding-top: 80px; padding-bottom: 50px; }
  .page-hero-actions { flex-direction: column; align-items: center; }
  .page-hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }
  .banner-hero { min-height: 75vh; }
  .banner-hero .banner-cap { padding-top: 80px; padding-bottom: 60px; }
  .header-transparent { border-bottom-color: transparent; }
  .hero-immersive { min-height: 90vh; }
  .hero-immersive-content { padding-top: 80px; padding-bottom: 60px; }
  .hero-immersive-actions { flex-direction: column; align-items: center; }
  .hero-immersive-actions .btn { width: 100%; max-width: 280px; justify-content: center; }
  .cap-banner-immersive .cap-banner-img { aspect-ratio: 4/5; }
  .cap-banner-shade,
  .cap-banner-shade-left,
  .cap-banner-shade-right {
    background: linear-gradient(180deg, transparent 20%, rgba(29,26,23,0.8) 100%) !important;
  }
  .cap-banner-immersive .cap-banner-content,
  .cap-banner-immersive.reverse .cap-banner-content {
    align-items: flex-end;
    justify-content: flex-start;
  }
  .promises-compact {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .promise-item:not(:last-child)::after {
    right: 10%; left: 10%;
    top: auto; bottom: -1rem;
    width: auto; height: 1px;
  }
  .audience-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .audience-item { padding: 1.2rem 1rem; }
}
@media (max-width: 480px) {
  .audience-grid { grid-template-columns: 1fr; }
}

/* ========== 城市轮播 ========== */
.city-slider {
  position: relative;
}
.city-slider-imgs {
  position: absolute;
  inset: 0;
}
.city-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}
.city-slide.active {
  opacity: 1;
  position: absolute;
}
.cap-banner-img .city-slide.active {
  position: relative;
}
.city-dots {
  position: absolute;
  bottom: clamp(20px, 3vw, 36px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(6px, 1vw, 10px);
  z-index: 5;
  max-width: 90%;
}
.cases-dots {
  bottom: clamp(16px, 2.5vw, 28px);
}
@media (max-width: 640px) {
  .city-dots { gap: 5px; bottom: 14px; }
  .city-dot { padding: .3rem .55rem; font-size: .72rem; }
}
.city-dot {
  background: rgba(255,255,255,0.25);
  border: 1px solid rgba(255,255,255,0.35);
  color: rgba(255,255,255,0.8);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.4s var(--ease);
  backdrop-filter: blur(8px);
  font-family: inherit;
}
.city-dot:hover {
  background: rgba(255,255,255,0.35);
  color: #fff;
}
.city-dot.active {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
  font-weight: 500;
}
@media (max-width: 640px) {
  .city-dots {
    gap: 4px;
    bottom: 14px;
  }
  .city-dot {
    padding: 0.3rem 0.6rem;
    font-size: 0.72rem;
  }
}

/* ============================================
   移动端全面优化（Phone & Small Tablet）
   断点：≤768px 手机；≤480px 小屏；≤380px 极小屏
   ============================================ */

/* --- 平板竖屏/小笔记本预适配 --- */
@media (max-width: 1024px) {
  .nav { gap: 1.4rem; }
  .nav a { font-size: 0.84rem; }
}

/* --- 手机端主适配（≤768px） --- */
@media (max-width: 768px) {
  /* ===== 导航栏 ===== */
  .header-inner {
    height: 56px !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
  }
  .logo img { height: 28px; width: auto; }
  .logo-title { font-size: 1rem; }
  .logo-sub { display: none; }
  .nav { display: none !important; }
  .menu-toggle {
    display: flex !important;
    width: 44px;
    height: 44px;
    margin-right: -8px;
  }
  .mobile-menu {
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
  }
  .mobile-menu a {
    padding: 0.9rem 1.5rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-soft);
  }
  .mobile-menu a:last-child { border-bottom: none; }
  .header-transparent .mobile-menu {
    background: rgba(29,26,23,0.97);
    backdrop-filter: blur(20px);
  }
  .header-transparent .mobile-menu a {
    color: rgba(255,255,255,0.88);
    border-bottom-color: rgba(255,255,255,0.08);
  }
  .header-transparent .mobile-menu a.active { color: #fff; }
  .nav-cta-m {
    display: block;
    margin: 0.8rem 1.5rem 0;
    text-align: center;
  }

  /* ===== 容器 & Section 间距 ===== */
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .section {
    padding-top: clamp(48px, 10vw, 72px);
    padding-bottom: clamp(48px, 10vw, 72px);
  }
  .manifesto {
    padding: clamp(56px, 12vw, 90px) 0;
  }

  /* ===== 首页沉浸式 Hero ===== */
  .hero-immersive {
    min-height: 92vh;
  }
  .hero-immersive-content {
    padding-top: 72px;
    padding-bottom: 80px;
  }
  .hero-eyebrow {
    font-size: 0.72rem;
    padding: 0.35rem 0.9rem;
    margin-bottom: 1.5rem;
    letter-spacing: 0.08em;
  }
  .hero-immersive-title {
    font-size: clamp(2rem, 9vw, 3rem) !important;
    line-height: 1.15 !important;
    margin-bottom: 1.2rem;
  }
  .hero-immersive-sub {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 2.2rem;
    padding: 0 0.5rem;
  }
  .hero-immersive-actions {
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
  }
  .hero-immersive-actions .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
    min-height: 48px;
    font-size: 0.95rem;
  }
  .hero-scroll-hint { bottom: 1.4rem; }

  /* ===== 数据条（4列→2x2网格） ===== */
  .stats-immersive .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem 1rem;
  }
  .stats-immersive .stat-num {
    font-size: clamp(1.8rem, 7vw, 2.4rem);
  }
  .stats-immersive .stat-label {
    font-size: 0.8rem;
  }

  /* ===== 内页全屏 Hero ===== */
  .page-hero {
    min-height: 78vh;
  }
  .page-hero-content {
    padding-top: 72px;
    padding-bottom: 60px;
  }
  .page-hero-content .hero-tag {
    font-size: 0.72rem;
    padding: 0.35rem 0.9rem;
    margin-bottom: 1.2rem;
  }
  .page-hero-content h1 {
    font-size: clamp(1.8rem, 8vw, 2.6rem) !important;
    line-height: 1.2 !important;
    margin-bottom: 1rem;
  }
  .page-hero-content .hero-desc {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    padding: 0 0.5rem;
  }
  .page-hero-actions {
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
  }
  .page-hero-actions .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
    min-height: 48px;
    font-size: 0.95rem;
  }
  .page-hero-trust {
    font-size: 0.78rem;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.3rem 0.8rem;
  }

  /* ===== 合作城市 Banner Hero ===== */
  .banner-hero {
    min-height: 78vh;
  }
  .banner-hero .banner-cap {
    padding-top: 72px;
    padding-bottom: 70px;
  }
  .banner-hero .banner-chip {
    font-size: 0.72rem;
    padding: 0.35rem 0.9rem;
    margin-bottom: 1.2rem;
  }
  .banner-hero .banner-cap h2 {
    font-size: clamp(1.8rem, 8vw, 2.6rem) !important;
    line-height: 1.2 !important;
    margin-bottom: 1rem !important;
  }
  .banner-hero .banner-sub {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    padding: 0 0.5rem;
  }
  .banner-hero .page-hero-actions {
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
  }
  .banner-hero .page-hero-actions .btn {
    width: 100%;
    max-width: 300px;
    min-height: 48px;
  }
  .banner-hero .city-dots {
    bottom: 20px;
    gap: 6px;
    max-width: 94%;
  }
  .banner-hero .city-dot {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
  }

  /* ===== 核心能力通栏（cap-banner） ===== */
  .cap-banner {
    border-radius: 16px;
    overflow: hidden;
  }
  .cap-banner-img {
    aspect-ratio: 4/5;
  }
  .cap-banner-shade,
  .cap-banner.reverse .cap-banner-shade,
  .cap-banner-shade-left,
  .cap-banner-shade-right {
    background: linear-gradient(180deg, transparent 25%, rgba(29,26,23,0.82) 100%) !important;
  }
  .cap-banner-content,
  .cap-banner.reverse .cap-banner-content {
    align-items: flex-start;
    justify-content: flex-end;
    padding: 1.5rem;
  }
  .cap-banner-text {
    max-width: 100%;
    padding-bottom: 8px;
  }
  .cap-banner-num {
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
  }
  .cap-banner-text h3 {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
  }
  .cap-banner-text p {
    font-size: 0.88rem;
    line-height: 1.65;
  }

  /* ===== 通用网格改为单列/双列 ===== */
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  .promises-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .promise-item {
    padding: 1.5rem;
  }
  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  .apply-features {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.7rem;
  }
  .audience-item {
    padding: 1rem 0.8rem;
  }
  .audience-item .audience-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
    margin-bottom: 0.6rem;
  }
  .audience-item h4 {
    font-size: 0.92rem;
    margin-bottom: 0.3rem;
  }
  .audience-item p {
    font-size: 0.78rem;
    line-height: 1.5;
  }

  /* ===== 步骤区块 ===== */
  .step-row, .step-row.reverse {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .step-row.reverse .step-img { order: 0; }
  .step-num { font-size: 3rem; }
  .step-text h3 { font-size: 1.3rem; }
  .step-text p { font-size: 0.92rem; }

  /* ===== 卡片通用 ===== */
  .card {
    padding: 1.4rem;
  }
  .card h3 { font-size: 1.1rem; }
  .card p, .card-text { font-size: 0.9rem; line-height: 1.65; }

  /* ===== 产品页功能卡片 ===== */
  .product-tier {
    padding: 1.5rem;
  }
  .product-tier h3 { font-size: 1.15rem; }
  .product-tier .tier-features li {
    font-size: 0.88rem;
    padding: 0.4rem 0;
  }

  /* ===== 表单 ===== */
  .form-grid-2 {
    grid-template-columns: 1fr;
  }
  .form-group label { font-size: 0.88rem; }
  .form-control {
    padding: 0.75rem 0.9rem;
    font-size: 0.95rem;
  }
  .form-actions {
    flex-direction: column;
  }
  .form-actions .btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
  }

  /* ===== 按钮最小触控尺寸 ===== */
  .btn {
    min-height: 44px;
    padding: 0.65rem 1.3rem;
  }
  .btn-lg {
    min-height: 52px;
    padding: 0.8rem 1.8rem;
    font-size: 1rem;
  }

  /* ===== 标题字号 ===== */
  .display { font-size: clamp(1.8rem, 8vw, 2.6rem); }
  .h1 { font-size: clamp(1.6rem, 7vw, 2.2rem); }
  .h2 { font-size: clamp(1.4rem, 6vw, 1.8rem); }
  .h3 { font-size: 1.1rem; }
  .section-subtitle {
    font-size: 0.92rem;
    line-height: 1.65;
  }

  /* ===== 页脚 ===== */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  .footer-brand {
    align-items: center;
  }
  .footer-brand .logo {
    justify-content: center;
  }
  .footer-col h4 {
    margin-bottom: 0.8rem;
  }
  .footer-col a {
    padding: 0.3rem 0;
    display: inline-block;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
    padding-top: 1.5rem;
  }

  /* ===== AI搭档区块 ===== */
  .ai-buddy-grid { grid-template-columns: 1fr; }
  .ai-buddy-text { order: 1; padding: 0; }
  .ai-buddy-img {
    order: 2;
    max-width: 100%;
    aspect-ratio: 4/3;
    margin-top: 1.5rem;
  }
  .ai-buddy-text .h2 { font-size: 1.5rem; }

  /* ===== 合作案例卡片 ===== */
  .case-card {
    padding: 1.4rem;
  }
  .case-card .case-tag { font-size: 0.72rem; }
  .case-card h3 { font-size: 1.1rem; }
  .case-card p { font-size: 0.88rem; }

  /* ===== 宣言引言 ===== */
  .manifesto-quote {
    font-size: clamp(1.2rem, 5vw, 1.5rem);
    line-height: 1.6;
  }
  .manifesto-attr { font-size: 0.85rem; }

  /* ===== CTA 区块 ===== */
  .cta-section {
    padding: clamp(48px, 10vw, 72px) 0;
  }
  .cta-section h2 { font-size: clamp(1.5rem, 6vw, 2rem); }

  /* ===== 合作伙伴/Logo 区 ===== */
  .logo-row {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  .logo-row img {
    height: 28px;
    opacity: 0.7;
  }

  /* ===== 首页hero图片（旧版） ===== */
  .hero-grid { grid-template-columns: 1fr; }
  .hero-img { max-width: 100%; aspect-ratio: 4/3; }
  .hero-note {
    flex-wrap: wrap;
    gap: 0.6rem 1.2rem;
    justify-content: center;
  }

  /* ===== 承诺横向分隔线改为竖线 ===== */
  .promises-compact {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .promise-item:not(:last-child)::after {
    right: 15%;
    left: 15%;
    top: auto;
    bottom: -1rem;
    width: auto;
    height: 1px;
  }
}

/* --- 小屏手机（≤480px）进一步微调 --- */
@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-immersive-title {
    font-size: clamp(1.8rem, 10vw, 2.4rem) !important;
  }
  .hero-immersive-sub {
    font-size: 0.9rem;
    padding: 0;
  }
  .page-hero-content h1,
  .banner-hero .banner-cap h2 {
    font-size: clamp(1.6rem, 9vw, 2.2rem) !important;
  }
  .page-hero-content .hero-desc,
  .banner-hero .banner-sub {
    font-size: 0.9rem;
    padding: 0;
  }
  .audience-grid {
    grid-template-columns: 1fr;
  }
  .stats-immersive .stat-num {
    font-size: 1.6rem;
  }
  .stats-immersive .stat-label {
    font-size: 0.75rem;
  }
  .city-dot {
    padding: 0.3rem 0.55rem !important;
    font-size: 0.7rem !important;
  }
  .banner-hero .city-dots {
    gap: 4px;
    bottom: 16px;
  }
  .cap-banner-content {
    padding: 1.2rem;
  }
  .cap-banner-text h3 { font-size: 1.2rem; }
  .btn { min-height: 46px; }
}

/* --- 极小屏（iPhone SE等 ≤380px） --- */
@media (max-width: 380px) {
  .hero-immersive { min-height: 95vh; }
  .hero-immersive-title { font-size: 1.8rem !important; }
  .page-hero, .banner-hero { min-height: 82vh; }
  .page-hero-content h1,
  .banner-hero .banner-cap h2 { font-size: 1.6rem !important; }
  .logo-title { font-size: 0.95rem; }
  .logo-sub { display: none; }
  .hero-eyebrow,
  .page-hero-content .hero-tag,
  .banner-hero .banner-chip { font-size: 0.68rem; }
}
.abstract-line{display:none}
.hero-tech-layer{position:absolute;inset:0;z-index:1;pointer-events:none;overflow:hidden}.tech-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,0.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.025) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(ellipse 70% 60% at 50% 45%,#000 30%,transparent 100%);-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 45%,#000 30%,transparent 100%);opacity:.6}.tech-network{position:absolute;inset:0;width:100%;height:100%}.tech-lines{animation:techDrift 20s ease-in-out infinite alternate}.tech-nodes{animation:techPulse 3s ease-in-out infinite}@keyframes techDrift{0%{transform:translateX(0) translateY(0)}100%{transform:translateX(-8px) translateY(4px)}}@keyframes techPulse{0%,100%{opacity:.65}50%{opacity:1}}.tech-glow{position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none}.tech-glow-1{width:500px;height:500px;top:10%;right:5%;background:radial-gradient(circle,rgba(180,130,160,0.12) 0%,transparent 70%);animation:glowFloat1 8s ease-in-out infinite}.tech-glow-2{width:400px;height:400px;bottom:15%;left:8%;background:radial-gradient(circle,rgba(200,150,130,0.1) 0%,transparent 70%);animation:glowFloat2 10s ease-in-out infinite}@keyframes glowFloat1{0%,100%{transform:translate(0,0);opacity:.6}50%{transform:translate(-20px,15px);opacity:.9}}@keyframes glowFloat2{0%,100%{transform:translate(0,0);opacity:.5}50%{transform:translate(15px,-10px);opacity:.8}}.hero-center-glow{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:700px;height:400px;background:radial-gradient(ellipse,rgba(220,170,180,0.08) 0%,transparent 70%);z-index:1;pointer-events:none;animation:centerGlow 6s ease-in-out infinite}@keyframes centerGlow{0%,100%{opacity:.5;transform:translate(-50%,-50%) scale(1)}50%{opacity:.8;transform:translate(-50%,-50%) scale(1.05)}}
.hero-eyebrow{position:relative;padding-left:1.3rem!important}
.hero-eyebrow::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:6px;height:6px;border-radius:50%;background:rgba(220,180,195,0.9);box-shadow:0 0 8px rgba(220,180,195,0.6);animation:dotPulse 2s ease-in-out infinite}
@keyframes dotPulse{0%,100%{opacity:1;transform:translateY(-50%) scale(1)}50%{opacity:.6;transform:translateY(-50%) scale(0.85)}}
/* ========== 首页首屏（hero-light）= 婚纱照底图 · 适度遮罩 ==========
   保留 hero-v2.jpg 婚纱照为背景，配适度暖褐遮罩 + 白色雅致文字。
   不加独立卡片背景，banner 为一个整体。仅首页使用。 */
.hero-immersive.hero-light .hero-immersive-overlay {
  background:
    linear-gradient(180deg,
      rgba(24,18,16,0.52) 0%,
      rgba(24,18,16,0.30) 30%,
      rgba(24,18,16,0.20) 55%,
      rgba(24,18,16,0.55) 100%);
}
.hero-immersive.hero-light .hero-immersive-title { color: #fff; }
.hero-immersive.hero-light .hero-immersive-title .hero-accent {
  background: linear-gradient(135deg, #F4D4C6 0%, #DFAC9C 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-immersive.hero-light .hero-immersive-sub { color: rgba(255,255,255,0.9); }
.hero-immersive.hero-light .hero-eyebrow {
  background: rgba(0,0,0,0.18);
  border-color: rgba(255,255,255,0.28);
  color: #fff;
  backdrop-filter: blur(8px);
}
.hero-immersive.hero-light .hero-eyebrow::before { background: rgba(240,214,205,0.95); box-shadow: 0 0 8px rgba(240,214,205,0.6); }
.hero-immersive.hero-light .btn-white {
  background: #fff;
  color: var(--primary-dark);
  border-color: #fff;
  font-weight: 600;
}
.hero-immersive.hero-light .btn-white:hover { background: rgba(255,255,255,0.9); }
.hero-immersive.hero-light .btn-ghost-light {
  background: rgba(255,255,255,0.10);
  color: #fff;
  border-color: rgba(255,255,255,0.5);
  font-weight: 600;
}
.hero-immersive.hero-light .btn-ghost-light:hover { background: rgba(255,255,255,0.22); color: #fff; }
.hero-immersive.hero-light .hero-scroll-hint { color: rgba(255,255,255,0.6); }

/* ========== 城市合作申请弹窗 ========== */
.city-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(30, 20, 18, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  overflow-y: auto;
}
.city-modal-overlay[hidden] { display: none; }
.city-modal {
  width: 100%;
  max-width: 680px;
  max-height: 92vh;
  overflow-y: auto;
  background: var(--bg);
  border-radius: 22px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.28);
}
.city-modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 1.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.city-modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
}
.city-modal-sub {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.3rem;
}
.city-modal-close {
  flex: none;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.city-modal-close:hover {
  color: var(--ink);
  border-color: var(--primary-soft);
  background: var(--primary-tint);
}
.city-modal-body {
  padding: 1.5rem 1.75rem 1.75rem;
}
.city-modal-body .form-card { padding: 0; border: none; background: transparent; }

/* ========== 商务洽谈弹窗 ========== */
.biz-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(30, 20, 18, 0.5);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  overflow-y: auto;
}
.biz-modal-overlay[hidden] { display: none; }
.biz-modal {
  position: relative;
  width: 100%;
  max-width: 860px;
  max-height: 92vh;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  border-radius: 24px;
  background: var(--bg);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}
.biz-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 3;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--muted);
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: all var(--dur) var(--ease);
}
.biz-modal-close:hover {
  color: var(--ink);
  transform: rotate(90deg);
}
.biz-modal-left {
  padding: 2.6rem 2.4rem 2.4rem;
  color: #fff;
  background:
    radial-gradient(120% 120% at 10% 0%, rgba(200, 140, 120, 0.4) 0%, transparent 55%),
    radial-gradient(110% 120% at 100% 0%, rgba(190, 120, 110, 0.3) 0%, transparent 50%),
    linear-gradient(150deg, #33241F 0%, #241914 100%);
  display: flex;
  flex-direction: column;
}
.biz-kicker {
  display: inline-flex;
  align-self: flex-start;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1.4rem;
}
.biz-modal-title {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 1.1rem;
  color: #fff;
}
.biz-modal-desc {
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 1.8rem;
}
.biz-promise {
  margin-top: auto;
  display: grid;
  gap: 0.65rem;
}
.biz-promise p {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}
.biz-promise svg {
  color: rgba(240, 205, 175, 0.95);
  flex: none;
}
.biz-modal-right {
  padding: 2.4rem 2.2rem;
  background: linear-gradient(160deg, #FFFDFC 0%, #FBF3F0 100%);
  display: flex;
  align-items: center;
}
.biz-card {
  width: 100%;
}
.biz-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1.3rem;
}
.biz-contact {
  display: grid;
  gap: 1.05rem;
}
.biz-contact-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.biz-contact-ico {
  width: 40px;
  height: 40px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, #FBE7EA 0%, #F7D3D8 100%);
  color: var(--primary-dark);
}
.biz-label {
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 0.12rem;
  letter-spacing: 0.04em;
}
.biz-value {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
a.biz-value:hover { color: var(--primary-deep); }
.biz-copy-hint {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-tint);
  padding: 0.14rem 0.5rem;
  border-radius: 100px;
  cursor: pointer;
}
.biz-value-copy { cursor: pointer; }
.biz-qr {
  margin-top: 1.5rem;
  padding-top: 1.4rem;
  border-top: 1px dashed var(--border);
  display: flex;
  align-items: center;
  gap: 1.1rem;
}
.biz-qr img {
  width: 128px;
  height: 128px;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 6px;
  background: #fff;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.08);
}
.biz-qr-note {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.6;
}
@media (max-width: 720px) {
  .biz-modal { grid-template-columns: 1fr; }
  .biz-modal-left { padding: 2rem 1.6rem 1.8rem; }
  .biz-modal-right { padding: 1.8rem 1.6rem; }
}

/* ===== 红娘公约页：公约条目美化（2026-09-01） ===== */
.convention-item {
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 1.4rem 1.5rem;
  box-shadow: 0 2px 12px rgba(60, 40, 45, 0.05);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.convention-item:hover {
  transform: translateY(-2px);
  border-color: #F4D9DE;
  box-shadow: 0 10px 22px rgba(185, 120, 130, 0.13);
}
.convention-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, #F6DDE2 0%, #F2C9D2 100%);
  color: var(--primary-dark);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1;
  margin-top: 0.1rem;
}
.convention-title {
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}
.convention-item .card-text {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ink-2);
  margin: 0;
}
@media (max-width: 720px) {
  .convention-item { padding: 1.15rem 1.1rem; border-radius: 14px; gap: 0.9rem; }
  .convention-num { width: 34px; height: 34px; font-size: 0.95rem; }
  .convention-title { font-size: 1rem; }
}