/* Sagaway · 杭州通微人工智能科技有限公司
   暗金 × 墨黑 × 宋体 — 克制、有底蕴、现代 */

:root {
  --gold-1: #F4D98B;   /* 高光金 */
  --gold-2: #C9A44C;   /* 主金 */
  --gold-3: #8C6D2E;   /* 暗金 */
  --gold-line: #B9923F;
  --bg: #0A0A0C;       /* 墨黑 */
  --bg-2: #0D0D11;
  --panel-a: #15151B;
  --panel-b: #0E0E12;
  --ink: #E8E4D8;      /* 暖白正文 */
  --ink-dim: #908B7C;
  --ink-faint: #5A574E;
  --vermillion: #9E3B2E;
  --hair: rgba(185,146,63,.18);
  --hair-soft: rgba(232,228,216,.08);
  --gold-grad: linear-gradient(120deg, var(--gold-1) 0%, var(--gold-2) 45%, var(--gold-3) 100%);
  --maxw: 1120px;
  --serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", system-ui, sans-serif;
  --eng: "Cormorant Garamond", Georgia, serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::before {                       /* 极淡的颗粒 + 暖底,做旧质感 */
  content: "";
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(201,164,76,.10), transparent 60%),
    radial-gradient(900px 700px at -10% 12%, rgba(140,109,46,.07), transparent 55%);
}

a { color: var(--gold-1); text-decoration: none; }
a:hover { color: var(--gold-2); }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; position: relative; z-index: 1; }

/* ---------- 文字基调 ---------- */
h1, h2, h3, .serif { font-family: var(--serif); font-weight: 900; letter-spacing: .01em; }
.eyebrow {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .26em;
  text-transform: uppercase; color: var(--gold-2); margin: 0 0 18px;
}
.gold-text {
  background: var(--gold-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.lead { color: var(--ink-dim); font-size: clamp(17px, 2vw, 20px); line-height: 1.85; }
.dim { color: var(--ink-dim); }
.eng-sub { font-family: var(--eng); font-style: italic; color: var(--gold-3); font-size: 1.15em; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(150%) blur(12px);
  background: rgba(10,10,12,.62);
  border-bottom: 1px solid var(--hair-soft);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .mark { width: 42px; height: 42px; flex: none; object-fit: contain; border-radius: 8px; }
.brand .name { font-family: var(--serif); font-weight: 900; font-size: 19px; letter-spacing: .04em; color: var(--ink); }
.brand .name small { font-family: var(--eng); font-style: italic; font-weight: 600; color: var(--gold-2); margin-left: 8px; font-size: 15px; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { color: var(--ink-dim); font-size: 15px; font-family: var(--sans); transition: color .2s; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  border: 1px solid var(--gold-line); color: var(--gold-1) !important;
  padding: 8px 18px; border-radius: 999px; font-size: 14px;
}
.nav-cta:hover { background: rgba(201,164,76,.08); }
.nav-toggle { display: none; background: none; border: 0; color: var(--ink); font-size: 22px; cursor: pointer; }

/* ---------- 通用区块 ---------- */
section { padding: clamp(74px, 11vw, 132px) 0; position: relative; }
.section-label {
  font-family: var(--mono); font-size: 12px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--gold-3); display: inline-flex; align-items: center; gap: 12px; margin-bottom: 22px;
}
.section-label::before { content: ""; width: 34px; height: 1px; background: var(--gold-line); opacity: .6; }
h2 { font-size: clamp(28px, 4.4vw, 46px); line-height: 1.22; margin: 0 0 26px; }
.hr { height: 1px; background: linear-gradient(90deg, transparent, var(--hair), transparent); border: 0; margin: 0; }

/* ---------- Hero ---------- */
.hero { padding-top: clamp(70px, 11vw, 120px); padding-bottom: clamp(70px, 11vw, 120px); }
.hero .eyebrow { color: var(--gold-2); }
.hero h1 {
  font-size: clamp(40px, 8.2vw, 88px); line-height: 1.08; margin: 0 0 30px; letter-spacing: .005em;
}
.hero .lead { max-width: 660px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 40px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 30px; border-radius: 999px; font-size: 16px; font-family: var(--sans);
  transition: transform .18s ease, box-shadow .25s ease, background .25s;
}
.btn-primary { background: var(--gold-grad); color: #1a1407 !important; font-weight: 600; box-shadow: 0 8px 30px rgba(201,164,76,.18); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 38px rgba(201,164,76,.30); }
.btn-ghost { border: 1px solid var(--hair); color: var(--ink) !important; }
.btn-ghost:hover { border-color: var(--gold-line); background: rgba(201,164,76,.05); }

/* 灯/火花 视觉锤:圆点从灰变金 */
.ember {
  position: absolute; right: 4%; top: 50%; transform: translateY(-50%);
  width: min(360px, 34vw); aspect-ratio: 1; pointer-events: none; opacity: .92;
}
.ember .glow {
  position: absolute; inset: 0; border-radius: 50%;
  background: radial-gradient(circle, rgba(244,217,139,.22), rgba(201,164,76,.06) 45%, transparent 70%);
  animation: breathe 6s ease-in-out infinite;
}
.ember .core {
  position: absolute; left: 50%; top: 50%; width: 18px; height: 18px; margin: -9px 0 0 -9px;
  border-radius: 50%; background: var(--gold-grad);
  box-shadow: 0 0 30px 6px rgba(244,217,139,.45), 0 0 80px 18px rgba(201,164,76,.22);
  animation: pulse 6s ease-in-out infinite;
}
.ember .ring { position: absolute; inset: 22%; border: 1px solid var(--hair); border-radius: 50%; }
.ember .ring.r2 { inset: 8%; opacity: .55; }
@keyframes breathe { 0%,100% { transform: scale(1); opacity: .8; } 50% { transform: scale(1.08); opacity: 1; } }
@keyframes pulse { 0%,100% { transform: scale(.9); } 50% { transform: scale(1.12); } }

/* ---------- 理念卡片 ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: linear-gradient(160deg, var(--panel-a), var(--panel-b));
  border: 1px solid var(--hair-soft); border-radius: 16px; padding: 32px 30px;
  transition: border-color .3s, transform .3s;
}
.card:hover { border-color: var(--hair); transform: translateY(-4px); }
.card .idx { font-family: var(--mono); font-size: 13px; color: var(--gold-3); letter-spacing: .1em; }
.card h3 { font-size: 22px; margin: 14px 0 12px; color: var(--ink); }
.card p { margin: 0; color: var(--ink-dim); font-size: 15.5px; line-height: 1.8; }

/* ---------- 关于 / 双栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(34px, 6vw, 80px); align-items: center; }
.about-aside { font-family: var(--serif); }
.about-aside .big {
  font-size: clamp(54px, 9vw, 96px); line-height: 1; font-weight: 900;
  background: var(--gold-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.about-aside .label { color: var(--ink-dim); font-family: var(--sans); margin-top: 14px; font-size: 15px; }

/* ---------- 产品:点亮 ---------- */
.product { background: linear-gradient(180deg, transparent, rgba(13,13,17,.6) 18%, rgba(13,13,17,.6) 82%, transparent); }
.feat-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 8px; }
.feat { padding: 28px 4px; border-top: 1px solid var(--hair); }
.feat h3 { font-size: 19px; margin: 0 0 12px; color: var(--ink); }
.feat p { margin: 0; color: var(--ink-dim); font-size: 15px; line-height: 1.8; }
.feat .num { font-family: var(--mono); font-size: 12px; color: var(--gold-3); letter-spacing: .2em; }

/* 成就卡片样张 */
.showcase { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(34px,6vw,72px); align-items: center; }
.ach-card {
  position: relative; border-radius: 18px; padding: 40px 34px;
  background: radial-gradient(120% 140% at 50% -20%, #1c1710, #0c0b09 60%);
  border: 1px solid var(--gold-line);
  box-shadow: 0 0 0 1px rgba(244,217,139,.06) inset, 0 30px 80px -30px rgba(0,0,0,.9), 0 0 60px -20px rgba(201,164,76,.35);
  text-align: center; overflow: hidden;
}
.ach-card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 8%, rgba(244,217,139,.18), transparent 55%);
}
.ach-badge {
  position: absolute; top: 18px; right: 18px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em;
  color: var(--gold-1); border: 1px solid var(--gold-line); border-radius: 999px; padding: 5px 11px;
  background: rgba(201,164,76,.08);
}
.ach-card .ach-dot {
  width: 54px; height: 54px; border-radius: 50%; margin: 6px auto 22px; position: relative; z-index: 1;
  background: var(--gold-grad); box-shadow: 0 0 40px 8px rgba(244,217,139,.4);
}
.ach-card .ach-name {
  font-family: var(--serif); font-weight: 900; font-size: 46px; letter-spacing: .14em;
  background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  position: relative; z-index: 1;
}
.ach-card .ach-en { font-family: var(--eng); font-style: italic; color: var(--gold-3); margin-top: 6px; position: relative; z-index: 1; }
.ach-card .ach-quote { color: var(--ink); font-family: var(--serif); margin: 22px auto 24px; max-width: 280px; line-height: 1.9; position: relative; z-index: 1; }
.ach-card .ach-meta { font-family: var(--mono); font-size: 12.5px; color: var(--ink-dim); position: relative; z-index: 1; }
.ach-card .ach-meta b { color: var(--gold-1); font-weight: 500; }

/* ---------- 承诺 ---------- */
.pledge-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 1px; background: var(--hair-soft); border: 1px solid var(--hair-soft); border-radius: 16px; overflow: hidden; }
.pledge-item { background: var(--bg-2); padding: 30px 30px; }
.pledge-item h3 { font-size: 19px; margin: 0 0 10px; color: var(--ink); display: flex; align-items: center; gap: 12px; }
.pledge-item h3 .tick { color: var(--gold-1); font-family: var(--serif); }
.pledge-item p { margin: 0; color: var(--ink-dim); font-size: 15px; }

/* ---------- 联系 ---------- */
.contact-box { border: 1px solid var(--hair); border-radius: 20px; padding: clamp(34px,5vw,56px); background: linear-gradient(160deg, var(--panel-a), var(--panel-b)); }
.contact-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; margin-top: 34px; }
.contact-grid .ci .k { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; color: var(--gold-3); text-transform: uppercase; }
.contact-grid .ci .v { margin-top: 8px; font-size: 16px; color: var(--ink); }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--hair-soft); padding: 56px 0 48px; }
.footer .row { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; align-items: flex-start; }
.footer .name { font-family: var(--serif); font-weight: 900; font-size: 18px; color: var(--ink); }
.footer .links { display: flex; gap: 26px; flex-wrap: wrap; }
.footer .links a { color: var(--ink-dim); font-size: 14px; }
.footer .links a:hover { color: var(--gold-1); }
.footer .legal { margin-top: 30px; color: var(--ink-faint); font-size: 13px; line-height: 1.9; }
.footer .legal a { color: var(--ink-faint); }
.footer .legal a:hover { color: var(--ink-dim); }

/* ---------- 内容页(隐私/支持) ---------- */
.doc { padding-top: clamp(54px,8vw,96px); }
.doc .wrap { max-width: 820px; }
.doc h1 { font-size: clamp(32px,5vw,52px); margin: 0 0 14px; }
.doc h2 { font-size: clamp(21px,3vw,28px); margin: 48px 0 16px; }
.doc h3 { font-size: 18px; margin: 28px 0 10px; color: var(--ink); }
.doc p, .doc li { color: var(--ink-dim); font-size: 16px; line-height: 1.9; }
.doc ul { padding-left: 22px; }
.doc li { margin: 8px 0; }
.doc .updated { font-family: var(--mono); font-size: 13px; color: var(--gold-3); letter-spacing: .08em; }
.back { font-family: var(--sans); font-size: 14px; color: var(--ink-dim); display: inline-flex; gap: 8px; align-items: center; margin-bottom: 30px; }

/* ---------- 导航下拉 ---------- */
.nav-drop { position: relative; }
.nav-drop-trigger { background: none; border: 0; cursor: pointer; font-family: var(--sans); font-size: 15px;
  color: var(--ink-dim); display: inline-flex; align-items: center; gap: 5px; padding: 0; transition: color .2s; }
.nav-drop-trigger:hover, .nav-drop.open .nav-drop-trigger { color: var(--ink); }
.nav-drop-trigger .caret { font-size: 10px; opacity: .7; transition: transform .25s; }
.nav-drop.open .caret { transform: rotate(180deg); }
.nav-drop-menu { position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 210px; background: rgba(16,16,20,.98); border: 1px solid var(--hair); border-radius: 14px;
  padding: 10px; display: flex; flex-direction: column; gap: 2px;
  opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s ease, transform .2s ease; z-index: 60;
  box-shadow: 0 24px 60px -24px rgba(0,0,0,.9); }
.nav-drop.open .nav-drop-menu { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(10px); }
.nav-drop-menu a { color: var(--ink); font-size: 15px; padding: 10px 14px; border-radius: 9px; transition: background .2s, color .2s; }
.nav-drop-menu a:hover { background: rgba(201,164,76,.10); color: var(--gold-1); }
.nav-drop-soon { color: var(--ink-faint); font-size: 13.5px; padding: 10px 14px; cursor: default; }

/* ---------- 语言切换 ---------- */
.lang-switch { display: inline-flex; gap: 2px; border: 1px solid var(--hair); border-radius: 999px; padding: 3px; }
.lang-switch [data-lang] { background: none; border: 0; cursor: pointer; font-family: var(--sans); font-size: 12.5px;
  color: var(--ink-dim); padding: 4px 11px; border-radius: 999px; transition: color .2s, background .2s; line-height: 1; }
.lang-switch [data-lang]:hover { color: var(--ink); }
.lang-switch [data-lang].active { background: var(--gold-grad); color: #1a1407; font-weight: 600; }

/* ---------- 产品页 ---------- */
.product-hero { padding-top: clamp(56px,8vw,92px); }
.product-hero h1 { font-size: clamp(36px,7vw,72px); }

/* ---------- 法律页正文 ---------- */
.legal-doc .wrap { max-width: 820px; }
.legal-body { margin-top: 30px; }
.legal-body h2 { font-family: var(--serif); font-weight: 900; color: var(--ink); font-size: clamp(20px,3vw,26px); margin: 42px 0 14px; }
.legal-body h3 { font-family: var(--serif); color: var(--ink); font-size: 18px; margin: 26px 0 10px; }
.legal-body p, .legal-body li { color: var(--ink-dim); font-size: 15.5px; line-height: 1.95; }
.legal-body ul, .legal-body ol { padding-left: 22px; }
.legal-body li { margin: 7px 0; }
.legal-body strong { color: var(--ink); }
.legal-body a { color: var(--gold-1); }
.legal-body blockquote { border-left: 2px solid var(--gold-line); margin: 18px 0; padding: 6px 0 6px 18px; color: var(--ink-dim); }
.legal-body code { font-family: var(--mono); background: rgba(201,164,76,.10); padding: 2px 6px; border-radius: 5px; font-size: .9em; color: var(--gold-1); }

/* ---------- reveal 动效 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 880px) {
  .grid-3, .grid-4, .feat-row, .contact-grid { grid-template-columns: 1fr; }
  .grid-2, .split, .showcase, .pledge-list { grid-template-columns: 1fr; }
  .ember { display: none; }
  .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; flex-direction: column;
    background: rgba(10,10,12,.97); padding: 18px 28px 26px; gap: 18px; border-bottom: 1px solid var(--hair); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .showcase { gap: 40px; }
  .ach-card { order: -1; }
  .nav-drop { width: 100%; }
  .nav-drop-menu { position: static; transform: none; opacity: 1; visibility: visible; background: none;
    border: 0; box-shadow: none; padding: 6px 0 0 14px; min-width: 0; display: none; }
  .nav-drop.open .nav-drop-menu { display: flex; }
  .nav-drop-menu::before { display: none; }
  .lang-switch { margin-top: 8px; align-self: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}