/* ============================================================
   云途矢量 YUNTU VECTOR — Refined Flat / Soft Fruit
   单一主色（蜜橘珊瑚）+ 柔和暖调 + 细线分隔 + 大留白
   ============================================================ */
:root {
  /* 色板：收敛为 1 主色 + 3 暖调辅助 */
  --bg:      #FDFBF6;   /* 暖白底 */
  --surface: #FFFFFF;
  --ink:     #23201A;   /* 暖黑 */
  --muted:   #6F685C;   /* 次级文字 */
  --faint:   #A39B8C;   /* 弱化文字 */
  --line:    #EDE7DB;   /* 发丝线 */
  --coral:   #F96A47;   /* 主色：蜜橘珊瑚 */
  --coral-deep: #E4522F;
  --peach:   #FDEFE7;   /* 蜜桃浅底 */
  --lemon:   #FBF3D9;   /* 柠檬浅底（极少量） */
  --mint:    #E4F0DC;   /* 薄荷浅底（极少量） */
  --dark:    #26221B;   /* 终端深底 */

  --radius: 14px;
  --radius-s: 10px;
  --hairline: 1px solid var(--line);
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "PingFang SC", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --maxw: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
em { font-style: normal; color: var(--coral); }
a { color: inherit; text-decoration: none; }
::selection { background: var(--peach); color: var(--ink); }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(253,251,246,.88);
  backdrop-filter: blur(10px);
  border-bottom: var(--hairline);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 28px;
  height: 64px; display: flex; align-items: center; gap: 36px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand-logo { height: 36px; width: 36px; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-name { font-weight: 700; font-size: 15.5px; letter-spacing: .06em; }
.brand-en { font-family: var(--mono); font-size: 8px; color: var(--faint); letter-spacing: .24em; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  font-size: 13.5px; color: var(--muted); padding: 7px 14px;
  border-radius: 999px; transition: all .2s;
}
.nav-links a:hover { color: var(--ink); background: var(--peach); }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.lang-toggle {
  font-family: var(--mono); font-size: 11.5px; cursor: pointer;
  background: var(--surface); border: var(--hairline); padding: 6px 12px;
  border-radius: 999px; letter-spacing: .1em; color: var(--muted);
  transition: all .2s;
}
.lang-toggle:hover { border-color: var(--coral); color: var(--coral); }
.menu-btn { display: none; background: none; border: none; font-size: 20px; cursor: pointer; color: var(--ink); }

/* ===== HERO ===== */
.hero { position: relative; overflow: hidden; border-bottom: var(--hairline); }
.hero::before { /* 右上一块柔和蜜桃色圆，打破网格但不喧宾夺主 */
  content: ""; position: absolute;
  width: 520px; height: 520px; border-radius: 50%;
  background: var(--peach); top: -180px; right: -140px;
  pointer-events: none;
}
.hero-grid {
  position: relative;
  max-width: var(--maxw); margin: 0 auto; padding: 92px 28px 88px;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center;
}
.kicker {
  font-family: var(--mono); font-size: 11.5px; font-weight: 600;
  letter-spacing: .22em; color: var(--coral); text-transform: uppercase;
  margin-bottom: 22px; display: flex; align-items: center; gap: 10px;
}
.kicker::before { content: ""; width: 22px; height: 2px; background: var(--coral); display: inline-block; }
.hero-title { font-size: clamp(30px, 4.2vw, 48px); line-height: 1.24; font-weight: 800; letter-spacing: .015em; }
.hero-sub { margin-top: 20px; font-size: 15.5px; color: var(--muted); max-width: 520px; line-height: 1.85; }
.hero-cta { margin-top: 34px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 9px 22px; font-size: 13.5px; font-weight: 600;
  letter-spacing: .03em; line-height: 1.5;
  border-radius: 999px; transition: all .2s; cursor: pointer;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--coral); color: #fff; }
.btn-primary:hover { background: var(--coral-deep); transform: translateY(-1px); }
.btn-ghost { background: var(--surface); color: var(--ink); border: var(--hairline); }
.btn-ghost:hover { border-color: var(--coral); color: var(--coral); transform: translateY(-1px); }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 2px; border-radius: 4px; }

/* 旋转徽章：弱化为细线轮廓 */
.spin-badge {
  position: absolute; top: 40px; right: 4%;
  width: 96px; height: 96px; z-index: 3; opacity: .85;
  animation: spin 22s linear infinite;
}
.spin-badge text {
  font-family: var(--mono); font-size: 12px; font-weight: 600;
  letter-spacing: .32em; fill: var(--coral);
}
.badge-core { font-size: 22px !important; letter-spacing: 0 !important; fill: var(--coral); }
@keyframes spin { to { transform: rotate(360deg); } }

/* 终端：整页唯一的深色块，作为视觉锚点 */
.hero-terminal {
  background: var(--dark); border-radius: var(--radius);
  font-family: var(--mono); overflow: hidden;
}
.term-bar {
  display: flex; align-items: center; gap: 5px;
  padding: 13px 16px; border-bottom: 1px solid #383328;
}
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot:nth-child(1) { background: var(--coral); }
.dot:nth-child(2) { background: #E8C66B; }
.dot:nth-child(3) { background: #9DBE8D; }
.term-title { margin-left: auto; font-size: 10.5px; color: #948A76; }
.term-body {
  padding: 20px 22px; min-height: 252px; font-size: 12px; line-height: 2;
  color: #C9D6BC; white-space: pre-wrap; word-break: break-all;
}
.term-body .t-cmd { color: #F5F1E8; font-weight: 600; }
.term-body .t-red { color: #FF8A6B; }
.term-body .t-dim { color: #7E7563; }
.term-cursor {
  display: inline-block; width: 7px; height: 13px; background: var(--coral);
  vertical-align: -2px; animation: blink 1.1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ===== 滚动横幅：弱化为细线纸带 ===== */
.marquee {
  background: var(--surface); border-bottom: var(--hairline);
  overflow: hidden; padding: 12px 0;
}
.marquee-track {
  display: inline-block; white-space: nowrap; will-change: transform;
  animation: marquee 30s linear infinite;
  font-family: var(--mono); font-size: 12px; letter-spacing: .14em;
  color: var(--faint);
}
.marquee-track .star { color: var(--coral); margin: 0 20px; font-size: 10px; }
@keyframes marquee { to { transform: translateX(-50%); } }
.marquee:hover .marquee-track { animation-play-state: paused; }

/* ===== 数据带 ===== */
.stats {
  max-width: var(--maxw); margin: 0 auto; padding: 56px 28px;
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.stat { padding: 4px 28px; border-left: var(--hairline); }
.stat:first-child { border-left: none; padding-left: 0; }
.stat-num {
  display: block; font-size: 34px; font-weight: 800; font-family: var(--mono);
  color: var(--ink); line-height: 1.3; letter-spacing: -.02em;
}
.stat-label { font-size: 12.5px; color: var(--muted); letter-spacing: .02em; }

/* ===== 区块通用 ===== */
.section { max-width: var(--maxw); margin: 0 auto; padding: 104px 28px; }
.section-alt {
  max-width: none; background: var(--surface);
  border-top: var(--hairline); border-bottom: var(--hairline);
}
.section-alt > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }
.section-head { display: flex; gap: 18px; align-items: baseline; margin-bottom: 56px; }
.sec-num {
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  color: var(--coral); letter-spacing: .1em; flex-shrink: 0;
}
.sec-num::after { content: " /"; color: var(--faint); }
.section-head h2 { font-size: 28px; font-weight: 800; letter-spacing: .02em; }
.sec-desc { color: var(--muted); margin-top: 6px; font-size: 14.5px; }
.section-head > div { flex: 1; }

/* ===== 业务卡片 ===== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--surface); border: var(--hairline); border-radius: var(--radius);
  padding: 30px 28px 28px; display: flex; flex-direction: column;
  transition: transform .25s, border-color .25s;
}
.card:hover { transform: translateY(-4px); border-color: #DCD3C2; }
.card-band { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.card-id {
  width: 38px; height: 38px; border-radius: var(--radius-s);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 15px; font-weight: 700; color: var(--ink);
}
.card:nth-child(1) .card-id { background: var(--peach); color: var(--coral-deep); }
.card:nth-child(2) .card-id { background: var(--lemon); color: #9A7B1E; }
.card:nth-child(3) .card-id { background: var(--mint); color: #4E7A38; }
.card-tag { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: var(--faint); }
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; letter-spacing: .01em; }
.card p { font-size: 13.5px; color: var(--muted); flex: 1; line-height: 1.8; }
.card-list { margin-top: 22px; list-style: none; border-top: var(--hairline); padding-top: 16px; }
.card-list li {
  font-size: 13px; color: var(--muted); padding: 6px 0 6px 18px;
  position: relative; line-height: 1.6;
}
.card-list li::before {
  content: "→"; position: absolute; left: 0;
  color: var(--coral); font-family: var(--mono); font-size: 12px;
}

/* ===== 方法论 ===== */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.m-card { border-top: 2px solid var(--ink); padding-top: 20px; }
.m-num {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  color: var(--coral); letter-spacing: .12em;
}
.m-card h4 { font-size: 16.5px; font-weight: 700; margin: 12px 0 8px; }
.m-card p { font-size: 13px; color: var(--muted); line-height: 1.75; }

/* ===== 关于 ===== */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 72px; }
.about-logo { width: 96px; height: 96px; display: block; margin-bottom: 24px; }
.about-text p { margin-bottom: 18px; color: var(--muted); font-size: 14.5px; line-height: 1.9; }
.about-text p strong { color: var(--ink); }
.about-note { font-size: 12.5px !important; color: var(--faint) !important; }
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; align-content: start; }
.team-card {
  border: var(--hairline); border-radius: var(--radius); padding: 26px 18px;
  text-align: center; background: var(--surface);
  transition: transform .2s, border-color .2s;
}
.team-card:hover { transform: translateY(-3px); border-color: #DCD3C2; }
.avatar {
  width: 48px; height: 48px; margin: 0 auto 12px;
  font-family: var(--mono); font-size: 17px; font-weight: 700;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
}
.team-card:nth-child(1) .avatar { background: var(--peach); color: var(--coral-deep); }
.team-card:nth-child(2) .avatar { background: var(--lemon); color: #9A7B1E; }
.team-card:nth-child(3) .avatar { background: var(--mint); color: #4E7A38; }
.team-card:nth-child(4) .avatar { background: var(--bg); border: var(--hairline); color: var(--faint); }
.team-role { font-size: 12.5px; color: var(--muted); }
.team-more { display: flex; flex-direction: column; align-items: center; justify-content: center; }

/* ===== 联系 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; }
.contact-form label { display: block; margin-bottom: 18px; }
.contact-form span {
  display: block; font-size: 12.5px; font-weight: 600;
  color: var(--ink); margin-bottom: 7px; letter-spacing: .02em;
}
.contact-form input, .contact-form textarea {
  width: 100%; border: var(--hairline); background: var(--bg);
  border-radius: var(--radius-s); padding: 10px 14px; font-size: 13.5px;
  font-family: var(--sans); outline: none; transition: all .2s; color: var(--ink);
  line-height: 1.6;
}
.contact-form input:focus, .contact-form textarea:focus {
  border-color: var(--coral); background: var(--surface);
}
.contact-form .btn { margin-top: 10px; padding: 9px 28px; }
.form-hint { font-size: 12px; color: var(--faint); margin-top: 14px; }
.contact-info { display: flex; flex-direction: column; }
.c-item { padding: 22px 0; border-bottom: var(--hairline); }
.c-item:first-child { padding-top: 6px; }
.c-label {
  display: block; font-family: var(--mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: .18em; color: var(--coral); text-transform: uppercase;
  margin-bottom: 6px;
}
.c-item > span:last-child { font-size: 14px; color: var(--ink); }
.c-item.wechat-item { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.c-wechat-text { display: flex; flex-direction: column; gap: 4px; }
.qr-code {
  width: 84px; height: 84px; flex: none;
  border: var(--hairline); border-radius: 10px; padding: 5px; background: #fff;
}
.c-item a { color: var(--coral); }
.c-item a:hover { text-decoration: underline; }

/* ===== 页脚 ===== */
.footer { background: var(--dark); color: #A79C88; }
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 48px 28px;
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.f-brand { color: #F5F1E8; font-weight: 700; font-size: 16px; }
.f-brand span {
  font-family: var(--mono); font-size: 10px; color: var(--coral);
  letter-spacing: .22em; margin-left: 8px;
}
.footer [data-i18n="footer.slogan"] { font-size: 12.5px; margin-top: 4px; }
.f-meta { text-align: right; font-size: 11.5px; }
.f-icp { color: #6E6555; margin-top: 4px; }

/* ===== AI 助手 ===== */
.ai-widget {
  position: fixed; right: 24px; bottom: 24px; z-index: 200;
  display: flex; flex-direction: column; align-items: flex-end; gap: 12px;
}
.ai-fab {
  display: flex; align-items: center; gap: 7px; cursor: pointer;
  background: var(--coral); color: #fff; border: none;
  border-radius: 999px; padding: 10px 19px; font-size: 13px; font-weight: 600;
  letter-spacing: .03em;
  font-family: var(--sans); transition: all .2s;
}
.ai-fab:hover { background: var(--coral-deep); transform: translateY(-1px); }
.ai-fab:active { transform: scale(.97); }
.ai-fab-icon { font-size: 15px; }
.ai-panel {
  width: 330px; max-width: calc(100vw - 48px);
  background: var(--surface); border: var(--hairline); border-radius: var(--radius);
  overflow: hidden;
}
.ai-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 13px 16px; border-bottom: var(--hairline);
}
.ai-name { font-size: 12.5px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.ai-name::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--coral); }
.ai-close {
  background: none; border: none; color: var(--faint);
  font-size: 18px; cursor: pointer; line-height: 1; transition: color .2s;
}
.ai-close:hover { color: var(--ink); }
.ai-log {
  height: 272px; overflow-y: auto; padding: 16px;
  display: flex; flex-direction: column; gap: 12px; background: var(--bg);
}
.ai-msg { max-width: 84%; padding: 10px 14px; font-size: 13px; line-height: 1.65; }
.ai-msg.bot {
  background: var(--surface); border: var(--hairline);
  border-radius: 12px 12px 12px 4px; align-self: flex-start; color: var(--ink);
}
.ai-msg.user {
  background: var(--coral); color: #fff;
  border-radius: 12px 12px 4px 12px; align-self: flex-end;
}
.ai-input { display: flex; border-top: var(--hairline); background: var(--surface); }
.ai-input input {
  flex: 1; border: none; padding: 13px 15px; font-size: 13px;
  outline: none; background: transparent; color: var(--ink);
}
.ai-input button {
  border: none; background: none; padding: 0 18px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  color: var(--coral); font-family: var(--sans); transition: color .2s;
}
.ai-input button:hover { color: var(--coral-deep); }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .cards { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 28px 0; }
  .stat:nth-child(3) { border-left: none; padding-left: 0; }
  .spin-badge { width: 76px; height: 76px; top: 16px; right: 12px; }
}
@media (max-width: 640px) {
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg); border-bottom: var(--hairline);
    flex-direction: column; padding: 16px 24px; gap: 6px;
  }
  .nav-links.open { display: flex; }
  .menu-btn { display: block; }
  .grid-4, .team-grid { grid-template-columns: 1fr; }
  .section { padding: 72px 22px; }
  .hero-grid { padding: 64px 22px; }
  .stats { grid-template-columns: 1fr 1fr; padding: 40px 22px; }
  .stat { padding: 0 0 0 16px; }
  .stat:nth-child(odd) { border-left: none; padding-left: 0; }
  .section-head { flex-direction: column; gap: 8px; }
}