/* ==========================================================================
   Tiger-Yu — 商务形象站
   风格：深藏青 / 香槟金 / 细线网格 / 结构化排版
   ========================================================================== */

:root {
  --bg: #0b1620;
  --bg-2: #0f1d29;
  --panel: rgba(255, 255, 255, .03);
  --ink: #f2efe9;
  --dim: #a9b4bd;
  --mute: #74818c;
  --line: rgba(242, 239, 233, .14);
  --gold: #c3a36b;
  --gold-2: #dcc196;
  --grid: rgba(195, 163, 107, .10);
  --mass-fill: rgba(242, 239, 233, .07);
  --mass-line: rgba(242, 239, 233, .26);
  --header-h: 68px;
  --max: 1180px;
}

html.light-theme {
  --bg: #f4f1ea;
  --bg-2: #ece8df;
  --panel: #ffffff;
  --ink: #101c26;
  --dim: #42505c;
  --mute: #7b8791;
  --line: rgba(16, 28, 38, .16);
  --gold: #96733a;
  --gold-2: #b08a4b;
  --grid: rgba(150, 115, 58, .12);
  --mass-fill: rgba(16, 28, 38, .05);
  --mass-line: rgba(16, 28, 38, .22);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  padding-top: var(--header-h);
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s ease, color .3s ease;
}

::selection { background: var(--gold); color: #0b1620; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(195, 163, 107, .32); }
::-webkit-scrollbar-thumb:hover { background: rgba(195, 163, 107, .5); }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

[id] { scroll-margin-top: calc(var(--header-h) + 24px); }

/* ---------- 顶栏 ---------- */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--max);
  height: 100%;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex: 0 0 auto;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 28px; height: 28px;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .06em;
}

.brand-text {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .22em;
  color: var(--ink);
}

.brand-dot { color: var(--gold); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.site-nav a {
  position: relative;
  text-decoration: none;
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--dim);
  padding: 6px 0;
  transition: color .22s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width .26s ease;
}

.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after { width: 100%; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.icon-btn {
  width: 34px; height: 34px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--dim);
  font-size: .9rem;
  cursor: pointer;
  transition: border-color .22s ease, color .22s ease;
}

.icon-btn:hover { border-color: var(--gold); color: var(--gold); }

.lang-btn {
  min-width: 52px;
  height: 34px;
  padding: 0 12px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--dim);
  font-family: inherit;
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .1em;
  cursor: pointer;
  transition: border-color .22s ease, color .22s ease;
}

.lang-btn:hover { border-color: var(--gold); color: var(--gold); }

/* ---------- 首屏 ---------- */

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 72px;
  align-items: center;
  min-height: calc(100vh - var(--header-h));
  padding: 72px 0;
}

.eyebrow {
  font-size: .68rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow span { color: var(--mute); margin: 0 .3em; }

.hero-name {
  font-size: clamp(3rem, 7.4vw, 6.4rem);
  font-weight: 700;
  line-height: .94;
  letter-spacing: -.035em;
  margin: 18px 0 14px;
}

.hero-role {
  font-size: clamp(1.05rem, 1.6vw, 1.32rem);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: .01em;
}

.hero-lead {
  margin-top: 16px;
  max-width: 44ch;
  color: var(--dim);
  font-size: 1rem;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.btn {
  padding: 15px 30px;
  font-family: inherit;
  font-size: .92rem;
  font-weight: 600;
  letter-spacing: .03em;
  border-radius: 3px;
  cursor: pointer;
  transition: background-color .24s ease, color .24s ease, border-color .24s ease, transform .24s ease;
}

.btn-solid {
  background: var(--gold);
  border: 1px solid var(--gold);
  color: #0b1620;
}

.btn-solid:hover {
  background: var(--gold-2);
  border-color: var(--gold-2);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold-2);
  transform: translateY(-1px);
}

.coop {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  font-size: .86rem;
  color: var(--dim);
}

.coop a {
  color: var(--gold);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
  transition: color .22s ease, border-color .22s ease;
}

.coop a:hover { color: var(--gold-2); border-color: var(--gold-2); }

.coop:lang(en) a { margin-left: .32em; }

/* 首屏右侧蓝图面板 */

.hero-panel {
  justify-self: end;
  width: 100%;
  max-width: 420px;
}

.panel-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  border: 1px solid var(--line);
  background-color: rgba(255, 255, 255, .012);
  background-image:
    repeating-linear-gradient(0deg, transparent 0 39px, var(--grid) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 39px, var(--grid) 39px 40px);
}

.mass {
  position: absolute;
  bottom: 10%;
  display: block;
}

.mass-1 {
  left: 13%;
  width: 24%;
  height: 52%;
  background: linear-gradient(180deg, rgba(195, 163, 107, .82), rgba(195, 163, 107, .18));
}

.mass-2 {
  left: 41%;
  width: 17%;
  height: 26%;
  background: var(--mass-fill);
  border: 1px solid var(--mass-line);
}

.mass-3 {
  left: 62%;
  width: 21%;
  height: 68%;
  background: linear-gradient(180deg, var(--mass-fill), transparent);
  border: 1px solid var(--mass-line);
}

.mass-rule {
  position: absolute;
  left: 8%; right: 8%;
  bottom: 10%;
  height: 1px;
  background: rgba(195, 163, 107, .5);
}

.panel-caption {
  margin-top: 14px;
  display: flex;
  justify-content: space-between;
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mute);
}

.panel-caption span { color: var(--gold); }

/* ---------- 内容区块 ---------- */

.section {
  border-top: 1px solid var(--line);
  padding: 96px 0;
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.section-head {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: baseline;
  gap: 24px;
  padding-bottom: 22px;
  margin-bottom: 52px;
  border-bottom: 1px solid var(--line);
}

.section-head .num {
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.section-head h2 {
  font-size: clamp(1.45rem, 2.6vw, 1.95rem);
  font-weight: 600;
  letter-spacing: -.015em;
  line-height: 1.3;
}

.section-head .tag {
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mute);
}

.kicker {
  font-size: .66rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}

/* 关于 */

.about-grid {
  display: grid;
  grid-template-columns: .85fr 1.6fr;
  gap: 72px;
}

.aside-text {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--ink);
}

.about-body p {
  color: var(--dim);
  font-size: 1rem;
  line-height: 1.95;
  margin-bottom: 1.1em;
}

.about-body p:last-child { margin-bottom: 0; }

/* 能力 */

.cap-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 64px;
  border-top: 1px solid var(--line);
}

.cap-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 10px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.cap-no {
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  padding-top: .4em;
}

.cap-item p {
  color: var(--dim);
  font-size: .96rem;
  line-height: 1.78;
  transition: color .22s ease;
}

.cap-item:hover p { color: var(--ink); }

/* 经历 */

.exp-list { border-top: 1px solid var(--line); }

.exp-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 48px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.exp-years {
  font-size: .9rem;
  letter-spacing: .02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  padding-top: .25em;
}

.exp-main h3 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
}

.exp-role {
  margin: 7px 0 15px;
  font-size: .9rem;
  color: var(--mute);
  letter-spacing: .01em;
}

.exp-main ul { list-style: none; display: grid; gap: 9px; }

.exp-main li {
  position: relative;
  padding-left: 20px;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--dim);
}

.exp-main li::before {
  content: "";
  position: absolute;
  left: 0; top: .82em;
  width: 9px; height: 1px;
  background: var(--gold);
}

/* 国际交流 */

.intl-list { border-top: 1px solid var(--line); }

.intl-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.intl-no {
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  padding-top: .4em;
}

.intl-item p {
  color: var(--dim);
  font-size: .96rem;
  line-height: 1.78;
  transition: color .22s ease;
}

.intl-item:hover p { color: var(--ink); }

/* 教育与语言 */

.bg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.bg-card {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 32px;
}

.bg-card .kicker { margin-bottom: 14px; }

.bg-line {
  color: var(--dim);
  font-size: .95rem;
  line-height: 1.8;
  margin-top: 10px;
}

.bg-line.accent {
  color: var(--gold-2);
  margin-top: 16px;
}

/* 联系 */

.section-contact { border-bottom: 1px solid var(--line); }

.contact-block { padding: 8px 0 4px; }

.contact-mail {
  display: inline-block;
  margin-top: 8px;
  padding-bottom: 10px;
  font-size: clamp(1.35rem, 3.4vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -.015em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color .24s ease, border-color .24s ease;
}

.contact-mail:hover { color: var(--gold-2); border-color: var(--gold-2); }

.contact-note {
  margin-top: 26px;
  font-size: .9rem;
  color: var(--mute);
}

/* ---------- 页脚 ---------- */

.site-footer { padding: 36px 0; }

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: .78rem;
  color: var(--mute);
}

.footer-mark {
  font-size: .68rem;
  letter-spacing: .24em;
  color: var(--dim);
}

.footer-mark span { color: var(--gold); }

/* ---------- 响应式 ---------- */

@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 56px;
    padding: 56px 0 72px;
    min-height: 0;
  }
  .hero-panel { justify-self: start; max-width: 380px; }
  .panel-frame { aspect-ratio: 3 / 2; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .cap-list { grid-template-columns: 1fr; }
  .exp-row { grid-template-columns: 1fr; gap: 14px; }
  .exp-years { padding-top: 0; }
  .bg-grid { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 40px; }
}

@media (max-width: 768px) {
  .header-inner { gap: 16px; padding: 0 20px; }
  .site-nav { display: none; }
  .header-actions { margin-left: auto; }
  .brand-text { font-size: .72rem; letter-spacing: .18em; }
  .section-head {
    grid-template-columns: 40px 1fr;
    gap: 14px;
  }
  .section-head .tag { display: none; }
  .hero { padding: 0 20px; }
  .section-inner { padding: 0 20px; }
  .footer-inner { padding: 0 20px; flex-direction: column; align-items: flex-start; gap: 8px; }
  .bg-card { padding: 24px; }
}

@media (max-width: 520px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; text-align: center; }
  .hero-name { letter-spacing: -.03em; }
  .exp-main h3 { font-size: 1.02rem; }
  .section { padding: 56px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}