/* ==========================================================================
   CTMA 官方网站 · 基于 CTMA 设计系统令牌
   概念：一笔连线 The Thread — Connect · Share · Grow
   ========================================================================== */

/* ---- 品牌字体（已子集化，见 tools/ 说明） ---- */
@font-face {
  font-family: "CTMA Serif";
  src: url("assets/fonts/ctma-serif.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: "CTMA Sans";
  src: url("assets/fonts/ctma-sans.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: "CTMA Latin";
  src: url("assets/fonts/ctma-latin.woff2") format("woff2");
  font-display: swap;
}

/* ---- 设计令牌 ---- */
:root {
  --tax-blue:   #006496;
  --ink-blue:   #062A40;
  --thread:     #2E9BD8;
  --mist:       #8FC3E4;
  --paper-blue: #E8F2F9;

  --gold:       #B9975B;
  --gold-spark: #E9B949;
  --gold-cream: #F6E7C6;

  --ink:   #14232E;
  --slate: #4A5A66;
  --ash:   #93A1AB;
  --line:  #D8E0E6;
  --paper: #FAF8F4;
  --white: #FFFFFF;

  /* 三场景子主题（各场景独立使用，不混搭 —— 规则 S1） */
  --plus-paper: #FAF8F4;  --plus-rust: #C0653A;
  --out-paper:  #FAFBF7;  --out-moss:  #3D7A52;

  --f-serif: "CTMA Serif", "Source Han Serif SC", "Noto Serif SC", "思源宋体", SimSun, serif;
  --f-sans:  "CTMA Sans", Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  --f-latin: "CTMA Latin", "Marcellus", Georgia, serif;
  --f-mono:  "IBM Plex Mono", "SF Mono", ui-monospace, monospace;

  --ease-thread: cubic-bezier(0.22, 0.61, 0.36, 1); /* 连线缓动 */
  --maxw: 1280px;
  --rail: 96px; /* 左侧连线路轨宽度 */
}

/* ---- 基础 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.en {
  font-family: var(--f-latin);
  text-transform: lowercase;
  letter-spacing: 0.14em;
}
::selection { background: var(--thread); color: var(--white); }

/* ---- 入场编排（滚动触发） ---- */
.observe {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-thread) var(--d, 0s),
              transform 0.7s var(--ease-thread) var(--d, 0s);
}
.observe.is-in { opacity: 1; transform: none; }

/* ==========================================================================
   全局连线路轨（左侧，随滚动描绘）
   ========================================================================== */
.thread-rail {
  position: fixed;
  left: 18px; top: 0;
  width: 60px; height: 100vh;
  z-index: 5;
  pointer-events: none;
}
.thread-rail__path {
  stroke: var(--thread);
  stroke-width: 1.5;
  opacity: 0.55;
}
.thread-rail__nodes .node {
  fill: var(--gold);
  opacity: 0;
  transition: opacity 0.5s ease;
}
.thread-rail__nodes .node.is-lit { opacity: 1; }
@media (max-width: 1100px) { .thread-rail { display: none; } }

/* ==========================================================================
   导航
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 0 48px;
  height: 72px;
  color: var(--white);
  border-bottom: 1px solid transparent;
  transition: background 0.4s ease, border-color 0.4s ease;
}
.nav.is-solid {
  background: rgba(6, 42, 64, 0.92);
  backdrop-filter: blur(12px);
  border-bottom-color: rgba(143, 195, 228, 0.18);
}
.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__mark { width: 34px; height: 34px; }
.nav__word {
  font-family: var(--f-latin);
  letter-spacing: 0.22em;
  font-size: 15px;
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.nav__word-cn {
  font-family: var(--f-sans);
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--mist);
}
.nav__links {
  display: flex;
  gap: 32px;
  margin-left: auto;
}
.nav__links a {
  font-size: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.5;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.25s ease;
}
.nav__links a .en { font-size: 9px; color: var(--mist); }
.nav__links a:hover { color: var(--gold-spark); }
.nav__cta {
  font-size: 13px;
  letter-spacing: 0.12em;
  padding: 8px 22px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  color: var(--gold-cream);
  transition: background 0.25s ease, color 0.25s ease;
}
.nav__cta:hover { background: var(--gold); color: var(--ink-blue); }
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.nav__burger span {
  width: 22px; height: 1.5px;
  background: var(--white);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav { padding: 0 24px; }
  .nav__links {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--ink-blue);
    border-bottom: 1px solid rgba(143, 195, 228, 0.18);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease-thread);
  }
  .nav__links.is-open { max-height: 320px; }
  .nav__links a {
    flex-direction: row;
    gap: 12px;
    align-items: baseline;
    padding: 16px 24px;
    border-top: 1px solid rgba(143, 195, 228, 0.12);
  }
  .nav__cta { display: none; }
  .nav__burger { display: flex; }
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  background: var(--ink-blue);
  color: var(--white);
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background: url("assets/lineart-on-blue-web.jpeg") center / cover no-repeat;
  opacity: 0.14;
}
.hero__thread {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}
.hero__thread-path {
  stroke: var(--thread);
  stroke-width: 2;
}
.hnode circle { fill: var(--gold-spark); }
.hnode .hnode__halo {
  fill: none;
  stroke: var(--gold-spark);
  stroke-width: 1;
  opacity: 0;
}
.hnode { opacity: 0; }
.hnode.is-on { opacity: 1; transition: opacity 0.5s ease var(--d); }
.hnode.is-on .hnode__halo { opacity: 0.6; animation: halo 2.4s ease-in-out infinite var(--d); }
@keyframes halo {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.35); opacity: 0.15; }
}
.hnode__halo { transform-origin: center; transform-box: fill-box; }

.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 120px 48px 96px calc(var(--rail) + 48px);
}
.hero__eyebrow {
  font-size: 14px;
  letter-spacing: 0.28em;
  color: var(--mist);
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 40px;
}
.hero__eyebrow-en {
  font-family: var(--f-latin);
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--gold-cream);
}
.hero__title {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: clamp(2.6rem, 6.4vw, 4.9rem);
  line-height: 1.24;
  letter-spacing: 0.04em;
}
.hero__title-line { display: block; overflow: hidden; }
.hero__title-line > span { display: inline-block; }
.hero__title-accent { color: var(--gold-spark); }
.hero__tagline {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 15px;
  letter-spacing: 0.2em;
  color: var(--mist);
}
.hero__tagline-en {
  font-family: var(--f-latin);
  font-size: 20px;
  letter-spacing: 0.42em;
  color: var(--white);
}
.hero__actions { margin-top: 48px; display: flex; gap: 20px; flex-wrap: wrap; }

.hero__logo {
  position: absolute;
  right: 56px; bottom: 56px;
  width: clamp(140px, 16vw, 220px);
  z-index: 2;
  opacity: 0.92;
}
.hero__foot {
  position: absolute;
  left: calc(var(--rail) + 48px); bottom: 40px;
  z-index: 2;
}
.hero__scroll-hint {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ash);
  display: flex;
  align-items: center;
  gap: 16px;
}
.hero__scroll-line {
  display: inline-block;
  width: 64px; height: 1px;
  background: var(--ash);
  transform-origin: left;
  animation: hint 2s var(--ease-thread) infinite;
}
@keyframes hint { 0% { transform: scaleX(0.2); } 60% { transform: scaleX(1); } 100% { transform: scaleX(0.2); } }

/* 逐行揭面序列（hero 加载时间线） */
.reveal-seq {
  opacity: 0;
  transform: translateY(110%);
  animation: seq-up 0.8s var(--ease-thread) var(--d, 0s) forwards;
}
p.reveal-seq, div.reveal-seq, img.reveal-seq { transform: translateY(16px); animation-name: seq-fade; }
@keyframes seq-up { to { opacity: 1; transform: none; } }
@keyframes seq-fade { to { opacity: 1; transform: none; } }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  letter-spacing: 0.16em;
  padding: 14px 34px;
  border-radius: 999px;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.3s var(--ease-thread);
}
.btn:hover { transform: translateY(-2px); }
.btn--gold { background: var(--gold); color: var(--ink-blue); }
.btn--gold:hover { background: var(--gold-spark); }
.btn--ghost { border: 1px solid rgba(143, 195, 228, 0.5); color: var(--white); }
.btn--ghost:hover { border-color: var(--white); }
.btn__arrow { font-family: var(--f-latin); }

/* ==========================================================================
   通用版块
   ========================================================================== */
.section {
  position: relative;
  padding: 128px 48px 128px calc(var(--rail) + 48px);
}
.section__head {
  max-width: var(--maxw);
  margin: 0 auto 72px;
}
.section__label {
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--slate);
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  margin-bottom: 40px;
}
.section__label .en { color: var(--ash); font-size: 11px; }
.section__title {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  line-height: 1.3;
  letter-spacing: 0.03em;
}
.section__sub {
  margin-top: 24px;
  color: var(--slate);
  font-size: 15.5px;
}
.section__head--dark .section__label { border-top-color: rgba(143,195,228,0.25); color: var(--mist); }
.section__head--dark .section__sub { color: var(--mist); }

/* ==========================================================================
   关于协会
   ========================================================================== */
.about { background: var(--white); }
.about__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 64px;
}
.about__side { border-top: 1px solid var(--line); padding-top: 24px; }
.about__side-note {
  font-size: 13px;
  line-height: 2.1;
  color: var(--ash);
  letter-spacing: 0.06em;
}
.about__side-note strong { color: var(--slate); font-weight: 600; }
.about__lead {
  font-family: var(--f-serif);
  font-size: clamp(1.25rem, 2.1vw, 1.65rem);
  line-height: 2;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.about__lead em {
  font-style: normal;
  color: var(--tax-blue);
  border-bottom: 2px solid var(--thread);
  padding-bottom: 2px;
}
.about__facts {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.fact {
  padding: 32px 32px 8px 0;
  border-right: 1px solid var(--line);
}
.fact + .fact { padding-left: 32px; }
.fact:last-child { border-right: 0; }
.fact__k {
  font-family: var(--f-serif);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.fact__k .en { font-size: 11px; color: var(--thread); }
.fact__v { font-size: 14px; color: var(--slate); line-height: 2; }
@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; gap: 32px; }
  .about__facts { grid-template-columns: 1fr; }
  .fact { border-right: 0; border-bottom: 1px solid var(--line); padding: 24px 0; }
  .fact + .fact { padding-left: 0; }
  .fact:last-child { border-bottom: 0; }
}

/* ==========================================================================
   品牌理念 · 一笔连线（深底）
   ========================================================================== */
.thread {
  background: var(--ink-blue);
  color: var(--white);
  overflow: hidden;
}
.thread__bg {
  position: absolute; inset: 0;
  background: url("assets/lineart-on-blue-web.jpeg") center / cover no-repeat;
  opacity: 0.1;
}
.thread .section__head, .thread__steps { position: relative; z-index: 1; }
.thread__steps {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.tstep {
  padding: 40px 40px 16px 0;
  border-top: 1px solid rgba(143, 195, 228, 0.25);
  border-right: 1px solid rgba(143, 195, 228, 0.15);
}
.tstep + .tstep { padding-left: 40px; }
.tstep:last-child { border-right: 0; }
.tstep__num {
  font-family: var(--f-latin);
  font-size: 40px;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 28px;
}
.tstep__name {
  font-family: var(--f-latin);
  font-size: 26px;
  font-weight: 400;
  letter-spacing: 0.06em;
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 16px;
}
.tstep__cn {
  font-family: var(--f-serif);
  font-size: 18px;
  color: var(--gold-cream);
  letter-spacing: 0.2em;
}
.tstep__desc { font-size: 14px; color: var(--mist); line-height: 2; }
@media (max-width: 900px) {
  .thread__steps { grid-template-columns: 1fr; }
  .tstep { border-right: 0; padding: 28px 0; }
  .tstep + .tstep { padding-left: 0; }
}

/* ==========================================================================
   CTMA 字母柱
   ========================================================================== */
.letters {
  display: flex;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-blue);
}
.letters__col {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  min-height: 460px;
  padding: 56px 32px 32px;
  border-right: 1px solid var(--line);
  transition: flex 0.55s var(--ease-thread), opacity 0.4s ease, background 0.4s ease;
  overflow: hidden;
  position: relative;
}
.letters__col:last-child { border-right: 0; }
.letters:hover .letters__col { opacity: 0.35; }
.letters:hover .letters__col:hover {
  opacity: 1;
  flex: 1.7;
  background: var(--white);
}
.letters__glyph {
  font-family: var(--f-latin);
  font-size: clamp(6rem, 13vw, 12rem);
  line-height: 0.9;
  color: var(--accent);
  transition: transform 0.55s var(--ease-thread);
}
.letters__col:hover .letters__glyph { transform: translateY(-8px); }
.letters__meta { display: flex; flex-direction: column; gap: 6px; }
.letters__word {
  font-family: var(--f-latin);
  font-size: 15px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--slate);
}
.letters__cn {
  font-family: var(--f-serif);
  font-size: 17px;
  color: var(--ink);
  letter-spacing: 0.08em;
}
.letters__go {
  position: absolute;
  right: 28px; top: 56px;
  font-family: var(--f-latin);
  font-size: 22px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.35s ease, transform 0.35s var(--ease-thread);
}
.letters__col:hover .letters__go { opacity: 1; transform: none; }
@media (max-width: 900px) {
  .letters { flex-wrap: wrap; }
  .letters__col { flex: 1 1 50%; min-height: 280px; border-bottom: 1px solid var(--line); }
  .letters:hover .letters__col { opacity: 1; }
  .letters:hover .letters__col:hover { flex: 1 1 50%; }
}

/* ==========================================================================
   三大品牌活动
   ========================================================================== */
.scenes { background: var(--white); }
.scenes__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scene {
  position: relative;
  padding: 48px 36px 40px;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  transition: transform 0.45s var(--ease-thread), box-shadow 0.45s ease;
  overflow: hidden;
}
.scene:hover { transform: translateY(-6px); box-shadow: 0 24px 48px -24px rgba(6, 42, 64, 0.35); }
.scene__tag {
  font-family: var(--f-serif);
  font-size: 15px;
  letter-spacing: 0.28em;
  margin-bottom: 20px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.scene__tag .en { font-size: 12px; }
.scene__name {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: 28px;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}
.scene__desc { font-size: 14.5px; line-height: 2.1; flex: 1; }
.scene__mood {
  margin-top: 32px;
  font-size: 12px;
  letter-spacing: 0.22em;
}
.scene__line {
  position: absolute;
  left: 36px; right: 36px; bottom: 24px;
  height: 2px;
  transform: scaleX(0.25);
  transform-origin: left;
  transition: transform 0.6s var(--ease-thread);
}
.scene:hover .scene__line { transform: scaleX(1); }

/* 盛典 Pro：墨蓝 + 金 */
.scene--pro { background: var(--ink-blue); color: var(--white); }
.scene--pro .scene__tag { color: var(--gold-cream); }
.scene--pro .scene__name { color: var(--gold-spark); }
.scene--pro .scene__desc { color: var(--mist); }
.scene--pro .scene__mood { color: var(--gold); }
.scene--pro .scene__line { background: var(--gold); }

/* 拾光 Connect+：暖纸 + 赭红 */
.scene--plus { background: var(--plus-paper); color: var(--ink); border: 1px solid rgba(192,101,58,0.2); }
.scene--plus .scene__tag { color: var(--plus-rust); }
.scene--plus .scene__name { color: var(--ink); }
.scene--plus .scene__desc { color: var(--slate); }
.scene--plus .scene__mood { color: var(--plus-rust); }
.scene--plus .scene__line { background: var(--plus-rust); }

/* 同行 Outing：米白 + 苔绿 */
.scene--outing { background: var(--out-paper); color: var(--ink); border: 1px solid rgba(61,122,82,0.2); }
.scene--outing .scene__tag { color: var(--out-moss); }
.scene--outing .scene__name { color: var(--ink); }
.scene--outing .scene__desc { color: var(--slate); }
.scene--outing .scene__mood { color: var(--out-moss); }
.scene--outing .scene__line { background: var(--out-moss); }

@media (max-width: 900px) {
  .scenes__grid { grid-template-columns: 1fr; }
  .scene { min-height: 0; }
}

/* ==========================================================================
   活动与资讯（journal 列表）
   ========================================================================== */
.journal { background: var(--paper); }
.journal__list {
  max-width: var(--maxw);
  margin: 0 auto;
  list-style: none;
  border-top: 1px solid var(--line);
}
.journal__row a {
  display: grid;
  grid-template-columns: 120px 1fr auto 40px;
  align-items: baseline;
  gap: 32px;
  padding: 28px 8px;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease, padding-left 0.3s var(--ease-thread);
}
.journal__row a:hover { background: var(--white); padding-left: 20px; }
.journal__date {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--ash);
  letter-spacing: 0.08em;
}
.journal__title {
  font-family: var(--f-serif);
  font-size: 18px;
  letter-spacing: 0.03em;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 0.3s ease;
}
.journal__row a:hover .journal__title { text-decoration-color: var(--thread); }
.journal__cat {
  font-size: 12px;
  letter-spacing: 0.2em;
  padding: 4px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--slate);
}
.journal__cat.cat--pro { border-color: var(--gold); color: var(--gold); }
.journal__cat.cat--plus { border-color: var(--plus-rust); color: var(--plus-rust); }
.journal__cat.cat--outing { border-color: var(--out-moss); color: var(--out-moss); }
.journal__arrow {
  font-family: var(--f-latin);
  font-size: 18px;
  color: var(--ash);
  text-align: right;
  transition: color 0.3s ease, transform 0.3s var(--ease-thread);
}
.journal__row a:hover .journal__arrow { color: var(--tax-blue); transform: translateX(4px); }
.journal__note {
  max-width: var(--maxw);
  margin: 24px auto 0;
  font-size: 12.5px;
  color: var(--ash);
  letter-spacing: 0.06em;
}
@media (max-width: 900px) {
  .journal__row a { grid-template-columns: 1fr auto; row-gap: 8px; }
  .journal__date { grid-column: 1; }
  .journal__title { grid-column: 1 / -1; grid-row: 2; }
  .journal__arrow { display: none; }
}

/* ==========================================================================
   会员召唤（深底横幅）
   ========================================================================== */
.join {
  position: relative;
  background: var(--ink-blue);
  color: var(--white);
  padding: 160px 48px;
  text-align: center;
  overflow: hidden;
}
.join__bg {
  position: absolute; inset: 0;
  background: url("assets/lineart-on-blue-web.jpeg") center 30% / cover no-repeat;
  opacity: 0.16;
}
.join__inner { position: relative; z-index: 1; max-width: 720px; margin: 0 auto; }
.join__eyebrow {
  font-size: 13px;
  letter-spacing: 0.34em;
  color: var(--gold-cream);
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 32px;
}
.join__eyebrow .en { color: var(--gold); font-size: 11px; }
.join__title {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.4;
  letter-spacing: 0.05em;
  margin-bottom: 28px;
}
.join__desc { color: var(--mist); font-size: 15.5px; margin-bottom: 48px; }

/* ==========================================================================
   联系秘书处
   ========================================================================== */
.contact { background: var(--white); }
.contact__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact__card {
  border-top: 2px solid var(--gold);
  background: var(--paper-blue);
  padding: 48px 48px 40px;
}
.contact__role {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--slate);
  margin-bottom: 12px;
}
.contact__name {
  font-family: var(--f-latin);
  font-size: 44px;
  color: var(--tax-blue);
  letter-spacing: 0.06em;
  margin-bottom: 32px;
}
.contact__rows > div {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
}
.contact__rows dt { color: var(--ash); letter-spacing: 0.2em; font-size: 13px; padding-top: 2px; }
.contact__rows dd { color: var(--ink); letter-spacing: 0.04em; }
.contact__rows a {
  border-bottom: 1px solid var(--thread);
  padding-bottom: 1px;
  transition: color 0.25s ease;
}
.contact__rows a:hover { color: var(--tax-blue); }
.contact__qr { text-align: center; }
.contact__qr img {
  width: min(280px, 100%);
  margin: 0 auto 16px;
  border: 1px solid var(--line);
  padding: 8px;
  background: var(--white);
}
.contact__qr figcaption {
  font-size: 13px;
  color: var(--slate);
  line-height: 2;
}
.contact__qr .en { color: var(--ash); font-size: 11px; }
@media (max-width: 900px) {
  .contact__grid { grid-template-columns: 1fr; gap: 48px; }
}

/* ==========================================================================
   跑马灯
   ========================================================================== */
.marquee {
  background: var(--ink-blue);
  color: var(--gold-cream);
  border-top: 1px solid rgba(143, 195, 228, 0.15);
  overflow: hidden;
  padding: 20px 0;
}
.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 36s linear infinite;
}
.marquee__track span {
  font-family: var(--f-serif);
  font-size: 18px;
  letter-spacing: 0.24em;
  white-space: nowrap;
}
@keyframes marquee { to { transform: translateX(-50%); } }

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  background: var(--ink-blue);
  color: var(--mist);
  padding: 96px 48px 40px calc(var(--rail) + 48px);
}
.footer__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(143, 195, 228, 0.15);
}
.footer__mark { width: 56px; margin-bottom: 20px; }
.footer__brand {
  font-family: var(--f-latin);
  font-size: 22px;
  letter-spacing: 0.2em;
  color: var(--white);
  line-height: 1.6;
}
.footer__brand span {
  font-family: var(--f-sans);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ash);
}
.footer__head {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold-cream);
  margin-bottom: 20px;
  display: flex;
  gap: 12px;
  align-items: baseline;
}
.footer__head .en { color: var(--gold); font-size: 10px; }
.footer__col a {
  display: block;
  font-size: 13.5px;
  padding: 7px 0;
  border-bottom: 1px solid transparent;
  color: var(--mist);
  transition: color 0.25s ease;
}
.footer__col a:hover { color: var(--gold-spark); }
.footer__base {
  max-width: var(--maxw);
  margin: 32px auto 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--ash);
  letter-spacing: 0.08em;
}
.footer__motto .en { color: var(--gold); letter-spacing: 0.3em; }
@media (max-width: 900px) {
  .footer { padding: 64px 24px 32px; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

/* ==========================================================================
   响应式 & 无障碍
   ========================================================================== */
@media (max-width: 1100px) {
  .section { padding-left: 48px; }
  .hero__inner { padding-left: 48px; }
  .hero__foot { left: 48px; }
  .footer { padding-left: 48px; }
}
@media (max-width: 640px) {
  .section { padding: 88px 24px; }
  .hero__inner { padding: 120px 24px 96px; }
  .hero__foot { left: 24px; }
  .hero__logo { left: 24px; right: auto; bottom: 88px; width: 104px; }
  .nav { padding: 0 16px; }
  .join { padding: 112px 24px; }
  .contact__card { padding: 32px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .observe, .reveal-seq { opacity: 1 !important; transform: none !important; animation: none !important; transition: none !important; }
  .hnode { opacity: 1 !important; }
  .marquee__track { animation: none; }
  .hero__scroll-line { animation: none; }
}