/* ============================================
   长崎科技 CHANGQI TECH — 官网样式
   纯手写 CSS，无任何外部依赖 / 无 CDN 字体
   ============================================ */

:root {
  --ink: #0A1A2B;
  --ink-2: #122A40;
  --ink-3: #1B3A55;
  --paper: #FCFAF6;
  --paper-2: #F4EFE6;
  --paper-3: #EDE6DA;
  --gold: #A97833;
  --gold-2: #C9A063;
  --gold-soft: #E8D5B0;
  --teal: #1D6A64;
  --teal-2: #2C8C84;
  --brick: #98502F;
  --text: #1F2C38;
  --muted: #65727E;
  --muted-2: #8B959E;
  --line: #E2DACC;
  --line-dark: rgba(255, 255, 255, 0.12);
  --white: #ffffff;
  --radius: 4px;
  --radius-lg: 10px;
  --shadow-sm: 0 1px 2px rgba(10, 26, 43, 0.05), 0 4px 12px rgba(10, 26, 43, 0.04);
  --shadow: 0 2px 4px rgba(10, 26, 43, 0.04), 0 12px 32px rgba(10, 26, 43, 0.07);
  --shadow-lg: 0 8px 24px rgba(10, 26, 43, 0.08), 0 32px 64px rgba(10, 26, 43, 0.10);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
  --mono: "SF Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
  --max: 1180px;
}

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

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

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

::selection { background: var(--gold-soft); color: var(--ink); }

/* ---------- 布局工具 ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 28px; }
.wrap-narrow { max-width: 820px; margin: 0 auto; padding: 0 28px; }

.section { padding: 104px 0; position: relative; }
.section-sm { padding: 72px 0; }
.section-dark { background: var(--ink); color: #E8EEF4; }
.section-paper2 { background: var(--paper-2); }
.section-line { border-top: 1px solid var(--line); }

/* ---------- 排版 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
  display: block;
}
.section-dark .eyebrow { color: var(--gold-2); }
.section-dark .eyebrow::before { background: var(--gold-2); }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 600; letter-spacing: -0.01em; }

h1 { font-size: clamp(34px, 5vw, 58px); line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: clamp(27px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2vw, 23px); }
h4 { font-size: 17px; }

.lead {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}
.section-dark .lead { color: rgba(232, 238, 244, 0.72); }

.hl { color: var(--gold); }
.section-dark .hl { color: var(--gold-2); }

.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .lead { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn svg { width: 15px; height: 15px; flex: none; transition: transform 0.22s; }
.btn:hover svg { transform: translateX(3px); }

.btn-primary { background: var(--gold); color: #fff; }
.btn-primary:hover { background: #8F6426; transform: translateY(-1px); box-shadow: 0 8px 20px rgba(169, 120, 51, 0.28); }

.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: var(--ink-2); transform: translateY(-1px); box-shadow: var(--shadow); }

.btn-ghost { border-color: var(--line); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); background: var(--ink); color: #fff; }

.btn-ghost-light { border-color: rgba(255, 255, 255, 0.28); color: #fff; }
.btn-ghost-light:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.5); }

.btn-sm { padding: 9px 18px; font-size: 13.5px; }
.btn-lg { padding: 16px 32px; font-size: 15.5px; }

.btn-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.textlink {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--gold);
  border-bottom: 1px solid transparent;
  transition: all 0.2s;
}
.textlink:hover { border-bottom-color: var(--gold); gap: 11px; }
.textlink svg { width: 14px; height: 14px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 26, 43, 0.96);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 11px; flex: none; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-cn { color: #fff; font-size: 15.5px; font-weight: 600; letter-spacing: 0.14em; }
.brand-en { color: rgba(255, 255, 255, 0.42); font-size: 8.5px; letter-spacing: 0.26em; font-weight: 500; margin-top: 2px; }

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
  padding: 8px 13px;
  border-radius: 3px;
  transition: all 0.18s;
  white-space: nowrap;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.07); }
.nav-links a.active { color: var(--gold-2); }
.nav-cta { display: flex; align-items: center; gap: 10px; margin-left: 12px; flex: none; }
.nav-cta .btn { padding: 9px 18px; font-size: 13.5px; }

.nav-toggle { display: none; width: 38px; height: 38px; align-items: center; justify-content: center; }
.nav-toggle span { display: block; width: 19px; height: 1.5px; background: #fff; position: relative; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 19px; height: 1.5px; background: #fff; transition: 0.2s;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* 下拉菜单 */
.has-menu { position: relative; }
.dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  width: 300px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.has-menu:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown a { display: block; padding: 11px 12px; border-radius: 4px; color: var(--text); }
.dropdown a:hover { background: var(--paper-2); color: var(--ink); }
.dropdown .dd-t { font-size: 14px; font-weight: 600; display: block; }
.dropdown .dd-d { font-size: 12.5px; color: var(--muted); line-height: 1.5; margin-top: 2px; display: block; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
  padding: 96px 0 100px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 100%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  width: 900px; height: 900px;
  right: -320px; top: -420px;
  background: radial-gradient(circle, rgba(201, 160, 99, 0.16) 0%, transparent 62%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 64px; align-items: center; }
.hero h1 { color: #fff; margin-bottom: 24px; }
.hero .lead { color: rgba(232, 238, 244, 0.76); font-size: clamp(16px, 1.6vw, 18.5px); }
.hero .btn-row { margin-top: 36px; }
.hero-note {
  margin-top: 22px;
  font-size: 13px;
  color: rgba(232, 238, 244, 0.42);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-note svg { width: 13px; height: 13px; flex: none; opacity: 0.7; }

.hero-inner-narrow { max-width: 860px; }
.hero-inner-narrow .lead { max-width: 100%; }
/* 内页 hero 更矮 */
.hero-sm { padding: 68px 0 72px; }
.hero-sm h1 { font-size: clamp(30px, 4vw, 46px); }

/* hero 右侧面板 */
.panel-stack { display: flex; flex-direction: column; gap: 14px; }
.panel {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  backdrop-filter: blur(8px);
}
.panel-h { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.panel-t { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.5); font-weight: 600; }
.panel-tag { font-size: 11px; color: var(--gold-2); border: 1px solid rgba(201,160,99,0.35); border-radius: 99px; padding: 2px 9px; }
.panel-big { display: flex; align-items: baseline; gap: 8px; }
.panel-num { font-size: 40px; font-weight: 600; color: #fff; letter-spacing: -0.02em; line-height: 1; font-variant-numeric: tabular-nums; }
.panel-num small { font-size: 16px; opacity: 0.55; font-weight: 500; }
.panel-sub { font-size: 12.5px; color: rgba(255,255,255,0.45); margin-top: 8px; }

.bars { display: flex; align-items: flex-end; gap: 8px; height: 62px; margin-top: 14px; }
.bar { flex: 1; background: rgba(255,255,255,0.14); border-radius: 2px 2px 0 0; position: relative; transition: height 1s cubic-bezier(0.2,0.8,0.2,1); }
.bar.on { background: linear-gradient(180deg, var(--gold-2), rgba(201,160,99,0.35)); }
.bar-lab { position: absolute; bottom: -20px; left: 50%; transform: translateX(-50%); font-size: 9.5px; color: rgba(255,255,255,0.3); white-space: nowrap; }

.mini-row { display: flex; align-items: center; gap: 11px; padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,0.07); font-size: 13px; }
.mini-row:last-child { border-bottom: none; padding-bottom: 0; }
.mini-row .dot { width: 6px; height: 6px; border-radius: 50%; flex: none; }
.mini-row .name { color: rgba(255,255,255,0.8); flex: 1; }
.mini-row .val { color: var(--gold-2); font-variant-numeric: tabular-nums; font-weight: 600; font-size: 12.5px; }
.mini-row .val.ok { color: #7FC8A9; }

/* ---------- 数据条 ---------- */
.statbar { background: var(--ink-2); border-top: 1px solid var(--line-dark); }
.statbar-in { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 34px 28px; border-left: 1px solid var(--line-dark); }
.stat:first-child { border-left: none; }
.stat-n { font-size: 32px; font-weight: 600; color: #fff; letter-spacing: -0.02em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat-n small { font-size: 15px; font-weight: 500; opacity: 0.6; margin-left: 3px; }
.stat-l { font-size: 13px; color: rgba(232, 238, 244, 0.5); margin-top: 7px; }

/* ---------- 卡片通用 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--paper-3); }

.card-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  font-weight: 600;
}
.card h3 { margin-bottom: 12px; }
.card p { color: var(--muted); font-size: 14.5px; line-height: 1.75; }

/* 产品卡 */
.pcard {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 30px 30px;
  display: flex;
  flex-direction: column;
  transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.pcard::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent, var(--gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.pcard:hover::before { transform: scaleX(1); }
.pcard:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }

.pcard-ico {
  width: 44px; height: 44px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-bg, rgba(169,120,51,0.09));
  margin-bottom: 20px;
}
.pcard-ico svg { width: 22px; height: 22px; stroke: var(--accent, var(--gold)); }
.pcard-tag {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent, var(--gold));
  font-weight: 700;
  margin-bottom: 9px;
}
.pcard h3 { margin-bottom: 11px; font-size: 21px; }
.pcard .desc { color: var(--muted); font-size: 14.5px; line-height: 1.75; margin-bottom: 20px; }
.pcard ul { list-style: none; margin-bottom: 26px; }
.pcard li {
  font-size: 13.5px;
  color: #4A5866;
  padding-left: 19px;
  position: relative;
  margin-bottom: 9px;
  line-height: 1.6;
}
.pcard li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent, var(--gold));
  opacity: 0.55;
}
.pcard .pcard-foot { margin-top: auto; padding-top: 18px; border-top: 1px solid var(--paper-2); }

/* 三产品配色 */
.accent-gold { --accent: #A97833; --accent-bg: rgba(169,120,51,0.09); }
.accent-teal { --accent: #1D6A64; --accent-bg: rgba(29,106,100,0.09); }
.accent-brick { --accent: #98502F; --accent-bg: rgba(152,80,47,0.09); }

/* ---------- 痛点 / 三笔账 ---------- */
.ledger { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.ledger-item { background: var(--paper); padding: 36px 30px; }
.ledger-item .k { font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted-2); font-weight: 700; }
.ledger-item .amt { font-size: 34px; font-weight: 600; color: var(--brick); margin: 14px 0 4px; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; line-height: 1.1; }
.ledger-item .amt small { font-size: 15px; color: var(--muted); font-weight: 500; letter-spacing: 0; }
.ledger-item h4 { margin-bottom: 10px; font-size: 16px; }
.ledger-item p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }

/* ---------- 闭环流程 ---------- */
.loop-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 44px; }
.loop { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; align-items: stretch; }
.loop-step { padding: 0 22px; position: relative; }
.loop-step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -6px; top: 26px;
  width: 12px; height: 12px;
  border-top: 1.5px solid var(--gold-2);
  border-right: 1.5px solid var(--gold-2);
  transform: rotate(45deg);
}
.loop-n {
  width: 29px; height: 29px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  color: var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 12.5px;
  font-weight: 700;
  font-family: var(--mono);
  margin-bottom: 16px;
}
.loop-step h4 { font-size: 16px; margin-bottom: 8px; }
.loop-step p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }
.loop-step .who { display: inline-block; margin-top: 12px; font-size: 11.5px; color: var(--gold); border: 1px solid var(--gold-soft); border-radius: 99px; padding: 2px 10px; background: rgba(201,160,99,0.07); }

/* ---------- 功能列表（产品页） ---------- */
.feat-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.feat { background: #fff; padding: 32px 30px; }
.feat-ico { width: 34px; height: 34px; margin-bottom: 16px; }
.feat-ico svg { width: 22px; height: 22px; stroke: var(--gold); }
.feat h4 { margin-bottom: 9px; font-size: 16.5px; }
.feat p { font-size: 13.8px; color: var(--muted); line-height: 1.7; }

/* ---------- 步骤 ---------- */
.steps { counter-reset: step; }
.step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 22px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.step:last-child { border-bottom: none; }
.step-n {
  counter-increment: step;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gold);
  font-weight: 600;
  padding-top: 3px;
}
.step-n::before { content: "0" counter(step); }
.step h4 { margin-bottom: 7px; }
.step p { font-size: 14px; color: var(--muted); max-width: 68ch; }

/* ---------- 案例 / 样板 ---------- */
.case {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.case-info { padding: 44px; }
.case-visual {
  background: var(--ink);
  padding: 44px;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.case-visual::after {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.case-visual > * { position: relative; z-index: 1; }
.case-kv { display: flex; justify-content: space-between; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,0.1); font-size: 13.5px; }
.case-kv:last-child { border-bottom: none; }
.case-kv span:first-child { color: rgba(255,255,255,0.55); }
.case-kv span:last-child { color: #fff; font-weight: 600; font-variant-numeric: tabular-nums; }
.case-kv span.gold { color: var(--gold-2); }

/* ---------- 表格 / 价格 ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }
.plan {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.25s;
}
.plan:hover { box-shadow: var(--shadow); }
.plan.featured { border-color: var(--ink); box-shadow: var(--shadow-lg); position: relative; }
.plan.featured::before {
  content: "常用";
  position: absolute; top: -1px; right: 24px;
  background: var(--ink); color: #fff;
  font-size: 10.5px; letter-spacing: 0.12em;
  padding: 4px 11px; border-radius: 0 0 3px 3px;
}
.plan-name { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2); font-weight: 700; margin-bottom: 14px; }
.plan-price { display: flex; align-items: baseline; gap: 5px; margin-bottom: 6px; }
.plan-price .cur { font-size: 17px; color: var(--muted); }
.plan-price .num { font-size: 38px; font-weight: 600; letter-spacing: -0.02em; line-height: 1; font-variant-numeric: tabular-nums; }
.plan-price .unit { font-size: 13.5px; color: var(--muted); }
.plan-for { font-size: 13.5px; color: var(--muted); min-height: 42px; line-height: 1.6; margin-bottom: 20px; }
.plan ul { list-style: none; margin-bottom: 26px; flex: 1; }
.plan li { font-size: 13.8px; padding: 8px 0 8px 22px; position: relative; border-bottom: 1px dashed var(--paper-3); color: #3D4A56; }
.plan li:last-child { border-bottom: none; }
.plan li::before {
  content: "";
  position: absolute; left: 2px; top: 15px;
  width: 9px; height: 5px;
  border-left: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: rotate(-45deg);
}
.plan li.off { color: var(--muted-2); }
.plan li.off::before { border-color: var(--paper-3); }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  transition: color 0.2s;
}
.faq-q:hover { color: var(--gold); }
.faq-q .ico { width: 15px; height: 15px; flex: none; position: relative; }
.faq-q .ico::before, .faq-q .ico::after {
  content: ""; position: absolute; background: currentColor; transition: transform 0.3s;
}
.faq-q .ico::before { left: 0; top: 7px; width: 15px; height: 1.5px; }
.faq-q .ico::after { left: 7px; top: 0; width: 1.5px; height: 15px; }
.faq-item.open .faq-q .ico::after { transform: rotate(90deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.36s cubic-bezier(0.4,0,0.2,1); }
.faq-a-in { padding: 0 0 24px; font-size: 14.5px; color: var(--muted); line-height: 1.8; max-width: 76ch; }

/* ---------- CTA 区块 ---------- */
.cta {
  background: var(--ink);
  color: #fff;
  padding: 88px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.cta::before {
  content: "";
  position: absolute;
  width: 760px; height: 760px;
  left: 50%; bottom: -520px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(201,160,99,0.2) 0%, transparent 65%);
}
.cta .wrap { position: relative; z-index: 1; }
.cta h2 { color: #fff; margin-bottom: 18px; }
.cta p { color: rgba(232,238,244,0.7); max-width: 56ch; margin: 0 auto 34px; }
.cta .btn-row { justify-content: center; }

/* ---------- 表单 ---------- */
.form { display: grid; gap: 18px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 7px; color: var(--ink); }
.field label .req { color: var(--brick); margin-left: 3px; }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  font-size: 14.5px;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(169,120,51,0.1);
}
.field textarea { resize: vertical; min-height: 110px; }
.field-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { font-size: 12.5px; color: var(--muted-2); line-height: 1.7; }

/* ---------- 页脚 ---------- */
.site-footer { background: #071524; color: rgba(232,238,244,0.6); padding: 64px 0 30px; font-size: 13.5px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 44px; padding-bottom: 46px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { max-width: 34ch; line-height: 1.8; font-size: 13px; color: rgba(232,238,244,0.45); }
.footer-col h5 { color: #fff; font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; margin-bottom: 16px; font-weight: 600; }
.footer-col a { display: block; padding: 6px 0; color: rgba(232,238,244,0.55); transition: color 0.18s; font-size: 13.5px; }
.footer-col a:hover { color: var(--gold-2); }
.footer-bot { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-top: 26px; flex-wrap: wrap; font-size: 12.5px; color: rgba(232,238,244,0.35); }
.footer-bot a { color: rgba(232,238,244,0.35); }
.footer-bot a:hover { color: rgba(232,238,244,0.7); }

/* ---------- 滚动动画（仅 JS 可用时启用，保证无 JS / 爬虫可见） ---------- */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s cubic-bezier(0.2,0.8,0.2,1), transform 0.7s cubic-bezier(0.2,0.8,0.2,1); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 杂项 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 600;
  letter-spacing: 0.06em;
  padding: 4px 11px;
  border-radius: 99px;
  background: rgba(29,106,100,0.08);
  color: var(--teal);
  border: 1px solid rgba(29,106,100,0.16);
}
.badge.warn { background: rgba(152,80,47,0.07); color: var(--brick); border-color: rgba(152,80,47,0.18); }
.badge.gold { background: rgba(169,120,51,0.08); color: var(--gold); border-color: rgba(169,120,51,0.2); }
.badge.gray { background: var(--paper-2); color: var(--muted); border-color: var(--line); }

.tagrow { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag { font-size: 12px; padding: 4px 11px; border: 1px solid var(--line); border-radius: 99px; color: var(--muted); background: #fff; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split.wide-left { grid-template-columns: 1.15fr 0.85fr; }

.note-box {
  border-left: 2px solid var(--gold);
  background: rgba(201,160,99,0.055);
  padding: 18px 22px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
}
.note-box strong { color: var(--ink); }

.divider { height: 1px; background: var(--line); margin: 0; border: none; }

.hero-badges { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 26px; }
.hero-badges .badge { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.16); color: rgba(255,255,255,0.78); }

.kicker-num { font-family: var(--mono); font-size: 12px; color: var(--gold); letter-spacing: 0.08em; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .panel-stack { max-width: 460px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split.wide-left { grid-template-columns: 1fr; }
  .case { grid-template-columns: 1fr; }
  .loop { grid-template-columns: repeat(2, 1fr); gap: 34px 0; }
  .loop-step:nth-child(2)::after { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 34px; }
}

@media (max-width: 860px) {
  .section { padding: 72px 0; }
  .section-sm { padding: 52px 0; }
  .hero { padding: 68px 0 72px; }
  .hero-sm { padding: 52px 0 56px; }
  .grid-3, .ledger, .feat-list, .price-grid, .grid-2 { grid-template-columns: 1fr; }
  .statbar-in { grid-template-columns: 1fr 1fr; }
  .stat { padding: 24px 20px; }
  .stat:nth-child(3) { border-left: none; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line-dark); }
  .wrap, .wrap-narrow { padding: 0 20px; }
  .loop-wrap, .case-info, .case-visual, .card, .pcard, .plan { padding: 26px 22px; }
  .feat { padding: 26px 22px; }
  .ledger-item { padding: 28px 22px; }
  .field-2 { grid-template-columns: 1fr; }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .site-header.nav-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--ink);
    padding: 12px 20px 20px;
    border-bottom: 1px solid var(--line-dark);
    box-shadow: 0 24px 48px rgba(4, 12, 20, 0.55);
    align-items: stretch;
    gap: 2px;
    max-height: calc(100vh - 68px);
    overflow-y: auto;
  }
  .site-header.nav-open .nav-links a { padding: 12px 4px; font-size: 15px; }
  .dropdown { display: none; }
  .nav-cta .btn-ghost { display: none; }
  .case-visual { order: -1; }
  .step { grid-template-columns: 40px 1fr; gap: 14px; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .cta { padding: 64px 0; }
  .loop-step:not(:last-child)::after { display: none; }
  .loop-step { padding: 0 0 0 0; border-left: 1px solid var(--line); padding-left: 20px; }
}

@media (max-width: 480px) {
  body { font-size: 15px; }
  .btn { padding: 12px 20px; font-size: 14px; }
  .panel-num { font-size: 34px; }
  .stat-n { font-size: 26px; }
}

/* ---------- 二维码占位（contact） ---------- */
.qr-box {
  width: 154px; height: 154px;
  border: 1px dashed var(--line);
  border-radius: 6px;
  background: var(--paper-2);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.qr-box img { width: 100%; height: 100%; object-fit: cover; }
.qr-ph {
  display: none;
  flex-direction: column; align-items: center; gap: 7px;
  color: var(--muted-2); font-size: 12.5px; text-align: center; padding: 14px;
}
.qr-ph span { font-weight: 600; color: var(--muted); }
.qr-ph small { font-size: 10.5px; line-height: 1.55; opacity: 0.75; }

/* ---------- 待补充占位 ---------- */
.is-tbd { color: var(--muted-2) !important; font-weight: 400 !important; }

.form-tip { font-size: 13.5px; line-height: 1.7; }