/* =========================================================
   WWD CHINA · 第七届全球可持续时尚高峰论坛
   跨端 UI 样式表（PC + Mobile 响应式）
   ========================================================= */

:root {
  /* 品牌色 —— 深绿可持续主题 */
  --green-900: #0a1f14;
  --green-800: #0e2a1b;
  --green-700: #14321f;
  --green-600: #1e4a2f;
  --green-500: #2a6242;
  --moss-400:  #7a8f5f;
  --sage-300:  #c6d4b8;
  --gold-400:  #d4b97c;
  --gold-500:  #bd9f5f;
  --cream:     #f5f1e8;
  --cream-2:   #ebe4d3;
  --ink-70: rgba(245, 241, 232, 0.72);
  --ink-50: rgba(245, 241, 232, 0.5);
  --ink-30: rgba(245, 241, 232, 0.3);
  --line: rgba(245, 241, 232, 0.14);

  /* 字体 */
  --serif: "Cormorant Garamond", "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --sans: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;

  /* 布局 */
  --max: 1440px;
  --pad-desk: 80px;
  --pad-mob: 24px;

  /* 动效 */
  --ease: cubic-bezier(0.2, 0.65, 0.2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--green-800);
  color: var(--cream);
  font-size: 18px;
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .3s var(--ease), opacity .3s var(--ease); }
ul, ol { margin: 0; padding: 0; list-style: none; }
em, i { font-style: normal; }

/* =========================================================
   流体渐变背景（PC 端多层叠加；移动端简化）
   ========================================================= */
.bg-gradient {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(1200px 800px at 80% -10%, rgba(122,143,95,0.20), transparent 60%),
    radial-gradient(900px 700px at 10% 20%, rgba(30,74,47,0.55), transparent 60%),
    radial-gradient(1000px 900px at 60% 110%, rgba(10,31,20,0.85), transparent 55%),
    linear-gradient(180deg, #0e2a1b 0%, #0a1f14 100%);
  overflow: hidden;
}
.blob {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .55;
  animation: float 22s ease-in-out infinite;
}
.blob-1 { width: 520px; height: 520px; top: -120px; left: -120px; background: #1e4a2f; }
.blob-2 { width: 640px; height: 640px; top: 40%; right: -200px; background: #7a8f5f; opacity: .3; animation-delay: -6s; }
.blob-3 { width: 480px; height: 480px; bottom: -160px; left: 30%; background: #d4b97c; opacity: .14; animation-delay: -12s; }
@keyframes float {
  0%,100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.08); }
}
.noise {
  position: absolute; inset: 0; opacity: .05; pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/><feColorMatrix values='0 0 0 0 0.96  0 0 0 0 0.94  0 0 0 0 0.9  0 0 0 0.35 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* =========================================================
   顶部导航
   ========================================================= */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(10, 31, 20, 0.55);
  border-bottom: 1px solid var(--line);
  transition: background .4s var(--ease), padding .4s var(--ease);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  padding: 20px var(--pad-desk);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: inline-flex; align-items: baseline; gap: 12px; }
.brand-mark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 26px;
  letter-spacing: -0.02em;
  color: var(--cream);
}
.brand-sub {
  font-size: 11px; letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--ink-50);
}
.nav-links {
  display: flex; align-items: center; gap: 36px;
  font-size: 14px; letter-spacing: 0.08em;
}
.nav-links a { color: var(--ink-70); }
.nav-links a:hover { color: var(--cream); }
.nav-cta {
  background: var(--gold-400); color: var(--green-800) !important;
  padding: 12px 24px; border-radius: 100px; font-weight: 600;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 30px rgba(212,185,124,0.35); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%;
  background: transparent; cursor: pointer; position: relative;
}
.nav-toggle span {
  display: block; width: 18px; height: 1.5px; background: var(--cream);
  position: absolute; left: 13px; transition: transform .35s var(--ease), opacity .25s;
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 移动端全屏菜单 */
.mobile-menu {
  position: fixed; inset: 0; z-index: 35;
  background: rgba(10, 31, 20, 0.92);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  display: none;
  flex-direction: column; align-items: center; justify-content: center;
  gap: 40px; padding: 40px;
  opacity: 0; pointer-events: none; transition: opacity .4s var(--ease);
}
.mobile-menu.is-open { opacity: 1; pointer-events: auto; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 24px; text-align: center; }
.mobile-menu a {
  font-family: var(--serif); font-size: 32px; font-weight: 500;
  letter-spacing: 0.01em; color: var(--cream);
}
.mobile-menu .mobile-cta {
  display: inline-block; margin-top: 12px;
  padding: 14px 36px; border-radius: 100px;
  background: var(--gold-400); color: var(--green-800);
  font-family: var(--sans); font-size: 15px; font-weight: 600; letter-spacing: 0.1em;
}
.mobile-meta { text-align: center; color: var(--ink-50); font-size: 13px; letter-spacing: 0.2em; text-transform: uppercase; }
.mobile-meta p { margin: 4px 0; }

/* =========================================================
   通用容器 + 栏目标题
   ========================================================= */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-desk);
}
.section { padding: 140px 0; position: relative; }
.section-head { margin-bottom: 72px; max-width: 820px; }
.section-idx {
  display: inline-block;
  font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--gold-400); margin-bottom: 20px;
  padding-bottom: 10px; border-bottom: 1px solid rgba(212,185,124,0.35);
}
.section-title {
  font-family: var(--serif);
  font-size: 72px; font-weight: 500;
  line-height: 1.05; letter-spacing: -0.03em;
  color: var(--cream);
  margin: 0 0 16px;
}
.section-sub {
  font-size: 15px; color: var(--ink-50);
  letter-spacing: 0.1em; text-transform: uppercase; margin: 0;
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: 160px var(--pad-desk) 120px;
  max-width: var(--max); margin: 0 auto;
}
.hero-inner { max-width: 1200px; width: 100%; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--gold-400);
  padding: 10px 20px; border: 1px solid rgba(212,185,124,0.4);
  border-radius: 100px;
  margin-bottom: 36px;
  background: rgba(212,185,124,0.04);
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--gold-400); box-shadow: 0 0 0 4px rgba(212,185,124,0.2);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  50% { box-shadow: 0 0 0 8px rgba(212,185,124,0.05); }
}

.hero-title {
  font-family: var(--serif);
  font-weight: 500; color: var(--cream);
  font-size: clamp(56px, 9vw, 120px);
  line-height: 0.95; letter-spacing: -0.04em;
  margin: 0 0 48px;
}
.hero-title .cn { display: block; }
.hero-title .en {
  display: block;
  font-size: 0.36em;
  letter-spacing: 0.01em;
  color: var(--ink-70);
  margin-top: 24px;
  font-weight: 400;
}
.hero-title .en em { font-style: italic; color: var(--sage-300); }

.hero-meta {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 40px; padding: 40px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
}
.meta-col { display: flex; flex-direction: column; gap: 8px; }
.meta-col .label { font-size: 11px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--ink-50); }
.meta-col .value { font-size: 20px; font-weight: 500; color: var(--cream); }
.meta-col .muted { color: var(--ink-50); font-weight: 400; margin-left: 6px; font-size: 0.85em; }

.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 18px 36px; border-radius: 100px;
  font-size: 15px; font-weight: 500; letter-spacing: 0.05em;
  cursor: pointer; border: 1px solid transparent;
  transition: transform .35s var(--ease), background .35s var(--ease), color .35s var(--ease), box-shadow .35s var(--ease);
  min-height: 48px;
}
.btn-primary { background: var(--gold-400); color: var(--green-800); }
.btn-primary:hover { transform: translateY(-2px); background: var(--cream); box-shadow: 0 20px 40px rgba(212,185,124,0.3); }
.btn-ghost { background: transparent; color: var(--cream); border-color: var(--line); }
.btn-ghost:hover { background: rgba(245,241,232,0.08); border-color: rgba(245,241,232,0.4); }
.btn-outline { background: transparent; color: var(--cream); border-color: var(--gold-400); }
.btn-outline:hover { background: var(--gold-400); color: var(--green-800); }
.btn-lg { padding: 22px 44px; font-size: 16px; }

.hero-scroll {
  position: absolute; bottom: 60px; left: var(--pad-desk);
  display: flex; align-items: center; gap: 16px;
  font-size: 11px; letter-spacing: 0.35em; color: var(--ink-50);
  text-transform: uppercase;
}
.hero-scroll .line {
  width: 80px; height: 1px; background: linear-gradient(90deg, var(--ink-50), transparent);
  position: relative; overflow: hidden;
}
.hero-scroll .line::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, var(--gold-400) 50%, transparent);
  animation: slide 2.5s linear infinite;
}
@keyframes slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* =========================================================
   ABOUT
   ========================================================= */
.about-grid {
  display: grid; grid-template-columns: 5fr 7fr; gap: 80px;
  align-items: start;
}
.lead-quote {
  font-family: var(--serif);
  font-size: 34px; line-height: 1.35;
  font-style: italic; color: var(--sage-300);
  margin: 0; padding-left: 32px;
  border-left: 2px solid var(--gold-400);
}
.about-body p { color: var(--ink-70); margin: 0 0 20px; font-size: 17px; }
.about-body strong { color: var(--cream); font-weight: 500; }
.about-body .cta-line {
  font-family: var(--serif); font-size: 22px; font-style: italic;
  color: var(--cream); padding-top: 24px; border-top: 1px solid var(--line); margin-top: 32px;
}

.stats {
  margin-top: 100px;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat {
  padding: 48px 32px;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 8px;
}
.stat:last-child { border-right: none; }
.stat .num {
  font-family: var(--serif); font-size: 64px; line-height: 1;
  color: var(--gold-400); font-weight: 500; letter-spacing: -0.03em;
}
.stat .text { font-size: 14px; color: var(--ink-50); letter-spacing: 0.12em; }

/* =========================================================
   AGENDA 议程 —— PC 时间轴，移动垂直流
   ========================================================= */
.timeline { position: relative; padding-left: 200px; }
.timeline::before {
  content: ""; position: absolute;
  left: 170px; top: 0; bottom: 0;
  width: 1px; background: linear-gradient(180deg, transparent, var(--line) 10%, var(--line) 90%, transparent);
}
.t-item {
  position: relative;
  display: grid; grid-template-columns: 1fr;
  padding: 28px 0;
  transition: transform .4s var(--ease);
}
.t-time {
  position: absolute; left: -200px; top: 32px;
  width: 140px;
  font-family: var(--serif);
  display: flex; flex-direction: column; align-items: flex-start;
}
.t-time span {
  font-size: 42px; line-height: 1; color: var(--cream); font-weight: 500; letter-spacing: -0.02em;
}
.t-time em { font-size: 15px; color: var(--ink-50); margin-top: 6px; letter-spacing: 0.1em; }
.t-item::before {
  content: ""; position: absolute;
  left: -36px; top: 44px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--green-800);
  border: 2px solid var(--gold-400);
  box-shadow: 0 0 0 6px rgba(212,185,124,0.08);
  transition: transform .3s var(--ease);
}
.t-card {
  background: rgba(245,241,232,0.04);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px 40px;
  transition: background .35s var(--ease), border-color .35s var(--ease), transform .35s var(--ease);
}
.t-card:hover {
  background: rgba(245,241,232,0.08);
  border-color: rgba(212,185,124,0.35);
  transform: translateX(6px);
}
.t-tag {
  display: inline-block; font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--gold-400); margin-bottom: 14px;
}
.t-card h3 {
  font-family: var(--serif); font-size: 28px; font-weight: 500;
  color: var(--cream); margin: 0 0 8px; letter-spacing: -0.01em; line-height: 1.3;
}
.t-card p { color: var(--ink-70); margin: 0; font-size: 15px; line-height: 1.6; }
.t-item.lunch .t-card { background: rgba(122,143,95,0.08); border-color: rgba(122,143,95,0.35); }

/* =========================================================
   SPEAKERS 嘉宾
   ========================================================= */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.speaker {
  display: grid; grid-template-columns: 280px 1fr;
  gap: 32px;
  background: linear-gradient(160deg, rgba(245,241,232,0.05), rgba(245,241,232,0.01));
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 28px;
  transition: transform .45s var(--ease), border-color .45s var(--ease), background .45s var(--ease);
  position: relative; overflow: hidden;
}
.speaker::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(400px 200px at 100% 0%, rgba(212,185,124,0.12), transparent 60%);
  opacity: 0; transition: opacity .5s var(--ease);
}
.speaker:hover {
  transform: translateY(-4px);
  border-color: rgba(212,185,124,0.35);
  background: linear-gradient(160deg, rgba(245,241,232,0.08), rgba(245,241,232,0.02));
}
.speaker:hover::after { opacity: 1; }

.s-photo {
  position: relative;
  border-radius: 20px; overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--green-700);
}
.s-photo img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .7s var(--ease), filter .7s var(--ease);
  filter: saturate(0.9) contrast(1.02);
}
.speaker:hover .s-photo img { transform: scale(1.06); filter: saturate(1.05) contrast(1.05); }
.s-photo-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10,31,20,0.65) 100%);
}

.s-meta { display: flex; flex-direction: column; gap: 12px; position: relative; z-index: 1; }
.s-idx {
  font-family: var(--serif);
  font-size: 14px; color: var(--gold-400);
  letter-spacing: 0.2em;
}
.s-name {
  font-family: var(--serif); font-weight: 500; font-size: 32px;
  color: var(--cream); line-height: 1.1; letter-spacing: -0.02em;
  margin: 0;
}
.s-name .en {
  display: block; font-size: 18px; font-style: italic;
  color: var(--ink-50); margin-top: 6px; letter-spacing: 0;
}
.s-title { color: var(--cream); font-size: 15px; line-height: 1.5; margin: 0; font-weight: 400; }
.s-org {
  font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--gold-400); margin: 4px 0 6px;
  padding-bottom: 12px; border-bottom: 1px solid var(--line);
}
.s-bio { color: var(--ink-70); font-size: 14px; line-height: 1.7; }
.s-bio p { margin: 0; }
.s-tags {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 12px;
}
.s-tags li {
  font-size: 11px; letter-spacing: 0.1em;
  padding: 6px 12px; border: 1px solid var(--line);
  border-radius: 100px; color: var(--sage-300);
  background: rgba(198,212,184,0.04);
}

/* =========================================================
   VENUE 地点
   ========================================================= */
.venue-card {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0;
  background: rgba(245,241,232,0.04);
  border: 1px solid var(--line);
  border-radius: 32px;
  overflow: hidden;
}
.venue-info { padding: 64px; display: flex; flex-direction: column; gap: 20px; }
.venue-eyebrow { font-size: 12px; letter-spacing: 0.3em; color: var(--gold-400); margin: 0; }
.venue-name {
  font-family: var(--serif); font-size: 56px; font-weight: 500;
  color: var(--cream); line-height: 1.05; letter-spacing: -0.03em; margin: 0;
}
.venue-address { font-size: 17px; color: var(--ink-70); margin: 0 0 12px; }
.venue-meta { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
.venue-meta li {
  display: grid; grid-template-columns: 80px 1fr; gap: 16px;
  padding: 14px 0; border-top: 1px solid var(--line); font-size: 15px;
}
.venue-meta li:last-child { border-bottom: 1px solid var(--line); }
.venue-meta li span { color: var(--ink-50); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; align-self: center; }
.venue-meta li em { color: var(--cream); }
.venue-info .btn { align-self: flex-start; margin-top: 8px; }

.venue-map { position: relative; min-height: 520px; }
.map-svg { width: 100%; height: 100%; display: block; }

/* =========================================================
   REGISTER 报名
   ========================================================= */
.register-card {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  padding: 80px;
  background: linear-gradient(135deg, var(--green-700) 0%, var(--green-900) 100%);
  border: 1px solid rgba(212,185,124,0.25);
  border-radius: 32px;
  position: relative; overflow: hidden;
}
.register-card::before {
  content: ""; position: absolute; right: -120px; bottom: -160px;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(212,185,124,0.2), transparent 60%);
  pointer-events: none;
}
.reg-left .section-idx { border-bottom-color: rgba(212,185,124,0.5); }
.reg-left .section-title { font-size: 52px; line-height: 1.1; }
.reg-left > p { color: var(--ink-70); max-width: 480px; margin: 16px 0 28px; }
.reg-meta { display: flex; flex-direction: column; gap: 10px; margin-bottom: 36px; }
.reg-meta li {
  display: grid; grid-template-columns: 120px 1fr; gap: 12px;
  padding: 14px 0; border-bottom: 1px dashed var(--line); font-size: 15px;
}
.reg-meta li span { color: var(--ink-50); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; align-self: center; }
.reg-meta li em { color: var(--cream); }
.reg-cta { display: flex; gap: 16px; flex-wrap: wrap; }

.reg-right {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; position: relative; z-index: 1;
}
.qr {
  padding: 20px; background: var(--cream);
  border-radius: 24px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.3);
}
.qr-label {
  text-align: center; font-size: 13px; color: var(--ink-70); letter-spacing: 0.15em; text-transform: uppercase;
}
.qr-label em { display: block; font-style: italic; font-family: var(--serif); text-transform: none; color: var(--gold-400); margin-top: 6px; letter-spacing: 0; font-size: 14px; }

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  border-top: 1px solid var(--line);
  padding: 80px 0 40px;
  margin-top: 40px;
  background: rgba(10,31,20,0.6);
}
.f-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px;
  padding-bottom: 60px; border-bottom: 1px solid var(--line);
}
.f-col h4 {
  font-family: var(--sans); font-size: 12px; font-weight: 500;
  letter-spacing: 0.25em; text-transform: uppercase; color: var(--gold-400);
  margin: 0 0 16px;
}
.f-col p { margin: 6px 0; color: var(--ink-70); font-size: 14px; }
.f-col .brand-mark { font-size: 48px; display: block; margin-bottom: 12px; }
.muted { color: var(--ink-50); }
.f-bottom {
  padding-top: 30px;
  display: flex; justify-content: space-between; font-size: 12px; letter-spacing: 0.15em; color: var(--ink-50); text-transform: uppercase;
}

/* =========================================================
   显示控制
   ========================================================= */
.mobile-only { display: none; }
.desktop-only { display: inline-flex; }

/* =========================================================
   滚动入场动画
   ========================================================= */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* =========================================================
   响应式：Tablet
   ========================================================= */
@media (max-width: 1279px) {
  :root { --pad-desk: 48px; }
  .hero-title { font-size: clamp(48px, 8vw, 88px); }
  .section-title { font-size: 52px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .speakers-grid { grid-template-columns: 1fr; }
  .speaker { grid-template-columns: 220px 1fr; }
  .venue-card { grid-template-columns: 1fr; }
  .venue-map { min-height: 360px; }
  .register-card { grid-template-columns: 1fr; padding: 56px; }
  .reg-right { order: -1; }
  .f-inner { grid-template-columns: 1fr 1fr; gap: 40px; }
  .timeline { padding-left: 170px; }
  .timeline::before { left: 140px; }
  .t-time { left: -170px; width: 120px; }
}

/* =========================================================
   响应式：Mobile (< 768px)
   ========================================================= */
@media (max-width: 768px) {
  :root { --pad-desk: 20px; --pad-mob: 20px; }
  body { font-size: 16px; line-height: 1.6; }

  /* 导航 */
  .brand-sub { display: none; }
  .brand-mark { font-size: 22px; }
  .nav-inner { padding: 16px 20px; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .mobile-menu { display: flex; }

  /* Hero */
  .hero {
    min-height: 100vh;
    padding: 110px 20px 80px;
  }
  .eyebrow { font-size: 10px; padding: 8px 14px; letter-spacing: 0.2em; margin-bottom: 24px; }
  .hero-title {
    font-size: 48px; line-height: 1.02; letter-spacing: -0.02em;
    margin-bottom: 36px;
  }
  .hero-title .en { font-size: 0.42em; margin-top: 16px; }
  .hero-meta {
    grid-template-columns: 1fr; gap: 20px; padding: 24px 0; margin-bottom: 32px;
  }
  .meta-col .value { font-size: 17px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { justify-content: center; }
  .hero-scroll { display: none; }

  /* 栏目 */
  .section { padding: 80px 0; }
  .section-head { margin-bottom: 40px; }
  .section-title { font-size: 34px; line-height: 1.1; letter-spacing: -0.02em; }
  .section-sub { font-size: 12px; }
  .section-idx { font-size: 11px; margin-bottom: 14px; }

  /* ABOUT */
  .lead-quote { font-size: 22px; padding-left: 20px; line-height: 1.4; }
  .about-body p { font-size: 15px; }
  .about-body .cta-line { font-size: 18px; }
  .stats {
    margin-top: 48px;
    grid-template-columns: repeat(2, 1fr);
  }
  .stat { padding: 28px 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: none; }
  .stat:nth-last-child(-n+2) { border-bottom: none; }
  .stat .num { font-size: 40px; }
  .stat .text { font-size: 12px; }

  /* 议程：垂直流 */
  .timeline { padding-left: 0; }
  .timeline::before { display: none; }
  .t-item { display: block; padding: 12px 0; }
  .t-item::before { display: none; }
  .t-time {
    position: static; width: auto; left: auto; top: auto;
    flex-direction: row; align-items: baseline; gap: 12px;
    margin-bottom: 10px;
    padding-left: 16px;
    border-left: 2px solid var(--gold-400);
  }
  .t-time span { font-size: 24px; }
  .t-time em { font-size: 13px; margin-top: 0; }
  .t-card { padding: 20px 22px; border-radius: 16px; }
  .t-card h3 { font-size: 20px; }
  .t-card p { font-size: 14px; }
  .t-tag { font-size: 10px; margin-bottom: 10px; }

  /* 嘉宾：单列，图在顶部 */
  .speakers-grid { gap: 20px; }
  .speaker {
    grid-template-columns: 1fr;
    padding: 16px;
    border-radius: 20px;
    gap: 20px;
  }
  .s-photo { aspect-ratio: 4 / 5; border-radius: 14px; }
  .s-name { font-size: 26px; }
  .s-name .en { font-size: 15px; }
  .s-title { font-size: 14px; }
  .s-bio { font-size: 13px; }
  .s-tags li { font-size: 10px; padding: 5px 10px; }

  /* 地点 */
  .venue-info { padding: 32px 24px; }
  .venue-name { font-size: 32px; }
  .venue-address { font-size: 15px; }
  .venue-meta li { grid-template-columns: 70px 1fr; font-size: 14px; }
  .venue-map { min-height: 260px; }

  /* 报名：移动端转为 CTA，隐藏二维码 */
  .register-card { padding: 32px 24px; border-radius: 24px; gap: 32px; }
  .reg-left .section-title { font-size: 30px; }
  .reg-left > p { font-size: 15px; }
  .reg-meta li { grid-template-columns: 1fr; gap: 4px; padding: 10px 0; }
  .reg-meta li span { font-size: 10px; }
  .reg-cta { flex-direction: column; }
  .reg-cta .btn { justify-content: center; }
  .mobile-only { display: inline-flex; }
  .desktop-only { display: none !important; }

  /* 页脚 */
  .f-inner { grid-template-columns: 1fr; gap: 28px; padding-bottom: 32px; }
  .f-col .brand-mark { font-size: 36px; }
  .f-bottom { flex-direction: column; gap: 10px; align-items: flex-start; font-size: 11px; padding-top: 24px; }

  /* 安全区 */
  .nav { padding-top: env(safe-area-inset-top); }
  .nav-inner { padding-top: 16px; padding-bottom: 16px; }
  body { padding-bottom: env(safe-area-inset-bottom); }

  /* 简化背景 */
  .blob-2, .blob-3 { display: none; }
  .blob-1 { filter: blur(60px); opacity: .35; }
}

/* 去掉移动端的 hover */
@media (hover: none) {
  .speaker:hover, .t-card:hover, .btn:hover, .nav-cta:hover { transform: none; box-shadow: none; }
  .speaker:hover .s-photo img { transform: none; }
  .btn:active { opacity: .75; }
}

/* 无障碍：动画减少 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}