/* =========================================================================
   流苏硬盘医生 · 官网前端
   与后台同一套色板（冷灰 + 单一青），但前台要更"产品化"：
   - 首屏用浅青渐变 + 细网格，右侧放界面示意（纯 CSS，不依赖截图）
   - 卡片 16 圆角、1px 描边，hover 轻微上浮
   - 移动端 720px 断点，导航折叠为抽屉
   ========================================================================= */

:root {
  --primary: #0E7490;
  --primary-d: #0B5F78;
  --primary-l: #E8F4F8;
  --primary-ring: #BFE3EE;

  --t1: #111827;
  --t2: #4B5563;
  /* 原 #8A929E / #AEB6C2 在 12~13px 小字上只有 3.3:1 / 2.2:1，低于 WCAG AA */
  --t3: #667085;
  --t4: #8A929E;

  --bg: #FFFFFF;
  --soft: #F6F9FA;
  --card: #FFFFFF;
  --line: #E5E9EF;
  --line-2: #F1F4F7;

  --ok: #0F7B4F;
  --ok-bg: #EAF7F0;
  --warn: #B45309;
  --warn-bg: #FEF6E7;
  --bad: #B91C1C;
  --bad-bg: #FCEFEF;

  --radius: 16px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .04);
  --shadow: 0 10px 30px rgba(16, 24, 40, .07);
  --shadow-lg: 0 24px 60px rgba(16, 24, 40, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--t1);
  font: 15px/1.7 "Microsoft YaHei UI", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-d); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: Consolas, "Cascadia Mono", monospace; }
.muted { color: var(--t3); }
.tiny { font-size: 12.5px; }
.grow { flex: 1; }

/* ------------------------------------------------------------------ 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 22px;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fff; color: var(--t1);
  font-size: 14.5px; font-weight: 600; font-family: inherit;
  cursor: pointer; white-space: nowrap;
  transition: background .16s, border-color .16s, transform .16s, box-shadow .16s;
}
.btn:hover { border-color: var(--t4); color: var(--t1); }
.btn:active { transform: translateY(1px); }
.btn.sm { height: 38px; padding: 0 16px; font-size: 13.5px; border-radius: 9px; }
.btn.pri {
  background: var(--primary); border-color: var(--primary); color: #fff;
  box-shadow: 0 6px 16px rgba(14, 116, 144, .22);
}
.btn.pri:hover { background: var(--primary-d); border-color: var(--primary-d); color: #fff; }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; }
/* 不可用的按钮：不要用 <a> 假装按钮（鼠标还变手型、点击跳到别处） */
.btn.off { background: #B7C2CC; border-color: #B7C2CC; color: #fff; cursor: not-allowed; box-shadow: none; }
.btn.off:hover { background: #B7C2CC; border-color: #B7C2CC; color: #fff; }

/* ------------------------------------------------------------------ 导航 */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 24px; height: 66px; }

.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--t1); }
.logo:hover { color: var(--t1); }
.logo .mark {
  width: 32px; height: 32px; border-radius: 9px; flex: none;
  background: linear-gradient(135deg, #1291B0, #0B5F78);
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 12px rgba(14, 116, 144, .28);
}
.logo .mark svg { width: 19px; height: 19px; }

.links { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.links a {
  padding: 8px 12px; border-radius: 8px; color: var(--t2);
  font-size: 14px; transition: background .15s, color .15s;
}
.links a:hover { background: var(--soft); color: var(--t1); }
.links a.on { color: var(--primary); background: var(--primary-l); font-weight: 600; }

.burger {
  display: none; margin-left: auto;
  width: 38px; height: 38px; padding: 10px;
  background: #fff; border: 1px solid var(--line); border-radius: 9px; cursor: pointer;
}
.burger i { display: block; height: 2px; background: var(--t2); border-radius: 2px; margin: 3px 0; }

.drawer { display: none; border-top: 1px solid var(--line); background: #fff; padding: 8px 16px 14px; }
.drawer a { display: block; padding: 11px 6px; color: var(--t1); border-bottom: 1px solid var(--line-2); }
.drawer a:last-child { border: 0; }
.drawer.on { display: block; }

.notice {
  background: var(--primary-l); border-bottom: 1px solid var(--primary-ring);
  color: var(--primary-d); font-size: 13.5px;
}
.notice .wrap { padding: 9px 24px; }

/* ------------------------------------------------------------------ 首屏 */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 420px at 78% -8%, #E4F5FA 0%, rgba(228, 245, 250, 0) 62%),
    radial-gradient(700px 380px at 8% 8%, #EFF8FB 0%, rgba(239, 248, 251, 0) 60%),
    #fff;
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(16, 24, 40, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 24, 40, .045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}
.hero .wrap {
  position: relative; display: grid; grid-template-columns: 1.02fr .98fr;
  gap: 56px; align-items: center; padding-top: 74px; padding-bottom: 86px;
}
/* grid 子项默认 min-width:auto，模拟窗口比视口宽时会把整个容器撑破，
   导致右侧文字被裁（移动端实测过）。这里统一放开收缩。 */
.hero .wrap > * { min-width: 0; }

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  height: 30px; padding: 0 12px; border-radius: 999px;
  background: #fff; border: 1px solid var(--primary-ring);
  color: var(--primary-d); font-size: 12.5px; font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.pill i { width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }

.hero h1 {
  margin: 20px 0 16px;
  font-size: 44px; line-height: 1.22; letter-spacing: -.6px; font-weight: 700;
}
.hero h1 em { font-style: normal; color: var(--primary); }
.hero .lead { margin: 0 0 12px; font-size: 17px; color: var(--t2); max-width: 520px; }
.hero .sub { margin: 0 0 30px; font-size: 14px; color: var(--t3); }

.cta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.cta .hint { font-size: 12.5px; color: var(--t3); }

.hero-facts { display: flex; gap: 26px; margin-top: 34px; padding-top: 24px; border-top: 1px dashed var(--line); }
.hero-facts div b { display: block; font-size: 20px; letter-spacing: -.3px; }
.hero-facts div span { font-size: 12.5px; color: var(--t3); }

/* --------------------------------------------------- 首屏右侧：界面示意 */
.mock {
  border-radius: 18px; background: #fff; border: 1px solid var(--line);
  box-shadow: var(--shadow-lg); overflow: hidden;
  transform: perspective(1400px) rotateY(-5deg) rotateX(2deg);
  transition: transform .5s ease;
}
.hero:hover .mock { transform: perspective(1400px) rotateY(-2deg) rotateX(1deg) translateY(-3px); }

.mock-bar {
  display: flex; align-items: center; gap: 7px;
  height: 36px; padding: 0 14px; background: var(--soft);
  border-bottom: 1px solid var(--line);
}
.mock-bar i { width: 9px; height: 9px; border-radius: 50%; background: #D8DEE6; }
.mock-bar span { margin-left: 8px; font-size: 11.5px; color: var(--t3); }

.mock-body { display: grid; grid-template-columns: 158px 1fr; min-height: 318px; }

.mock-side { border-right: 1px solid var(--line); background: #FCFDFE; padding: 12px 10px; }
.mock-side .hd { font-size: 10.5px; color: var(--t4); letter-spacing: .4px; margin: 0 4px 8px; }
.mock-row {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 8px; border-radius: 7px; font-size: 12px; color: var(--t2);
}
.mock-row.sel { background: var(--primary-l); color: var(--primary-d); font-weight: 600; }
.mock-row .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--t4); flex: none; }
.mock-row.sel .dot { background: var(--primary); }
.mock-row .sz { margin-left: auto; font-size: 11px; color: var(--t3); font-variant-numeric: tabular-nums; }

.mock-main { padding: 14px 16px; }
.mock-concl {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 10px 12px; border-radius: 10px;
  background: var(--primary-l); border: 1px solid var(--primary-ring);
  font-size: 12px; color: var(--primary-d);
  line-height: 1.5;
}
.mock-concl b { font-size: 13.5px; }
.mock-concl .sep { color: #9CD0DF; }
.mock-concl .good { margin-left: auto; font-weight: 700; font-size: 13px; white-space: nowrap; }

.mock-list { margin-top: 12px; }
.mock-item {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 2px; border-bottom: 1px solid var(--line-2); font-size: 12px; color: var(--t2);
}
.mock-item:last-child { border-bottom: 0; }
.mock-item .bar { width: 38px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; flex: none; }
.mock-item .bar i { display: block; height: 100%; background: var(--primary); border-radius: 3px; }
.mock-item .bar.warn i { background: #D97706; }
.mock-item .nm { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mock-item .num { font-variant-numeric: tabular-nums; color: var(--t3); font-size: 11px; white-space: nowrap; }
.mock-item .tag {
  font-size: 10px; padding: 1px 6px; border-radius: 999px;
  background: var(--ok-bg); color: var(--ok); font-weight: 600;
}
.mock-item .tag.w { background: var(--warn-bg); color: var(--warn); }

/* ------------------------------------------------------------------ 区块 */
.sec { padding: 84px 0; }
.sec.soft { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { max-width: 620px; margin: 0 auto 44px; text-align: center; }
.sec-head .kicker { font-size: 12.5px; font-weight: 700; color: var(--primary); letter-spacing: 1.2px; text-transform: uppercase; }
.sec-head h2 { margin: 10px 0 12px; font-size: 30px; line-height: 1.3; letter-spacing: -.4px; }
.sec-head p { margin: 0; color: var(--t2); font-size: 15px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--primary-ring); }
.card .ico {
  width: 42px; height: 42px; border-radius: 11px;
  background: var(--primary-l); color: var(--primary);
  display: inline-flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.card .ico svg { width: 22px; height: 22px; }
.card h3 { margin: 0 0 8px; font-size: 17px; letter-spacing: -.2px; }
.card p { margin: 0; color: var(--t2); font-size: 14px; }

/* 流程 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.step {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 22px 24px;
}
.step::before {
  counter-increment: s; content: "0" counter(s);
  font: 700 12px/1 Consolas, monospace; color: var(--primary);
  background: var(--primary-l); border: 1px solid var(--primary-ring);
  padding: 6px 9px; border-radius: 7px; display: inline-block; margin-bottom: 14px;
}
.step h3 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0; font-size: 13.5px; color: var(--t2); }

/* 对比表 */
.compare {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: #fff; box-shadow: var(--shadow-sm);
}
.compare table { width: 100%; border-collapse: collapse; }
.compare th, .compare td { padding: 15px 20px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--line-2); }
.compare thead th { background: var(--soft); font-size: 12.5px; color: var(--t3); font-weight: 600; }
.compare tbody tr:last-child td { border-bottom: 0; }
.compare td.no { color: var(--t3); }
.compare td.yes { color: var(--t1); font-weight: 600; }
.compare td.yes i { color: var(--ok); font-style: normal; margin-right: 6px; }

/* ------------------------------------------------------------------ 内页 */
.page { padding: 56px 0 84px; }
.page-head { max-width: 720px; margin-bottom: 34px; }
.page-head h1 { margin: 0 0 10px; font-size: 32px; letter-spacing: -.5px; }
.page-head p { margin: 0; color: var(--t2); font-size: 15.5px; }

.crumb { font-size: 13px; color: var(--t3); margin-bottom: 18px; }
.crumb a { color: var(--t3); }
.crumb a:hover { color: var(--primary); }

/* 表单（卡密查询） */
.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; max-width: 560px; box-shadow: var(--shadow-sm);
}
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; color: var(--t2); margin-bottom: 7px; font-weight: 600; }
.inp {
  width: 100%; height: 46px; padding: 0 14px;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fff; color: var(--t1); font: 14.5px/1 inherit; font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.inp:focus { outline: none; border-color: var(--primary-ring); box-shadow: 0 0 0 3px var(--primary-l); }
.inp.mono { font-family: Consolas, "Cascadia Mono", monospace; font-size: 13px; letter-spacing: .2px; }

.cap { display: flex; gap: 10px; }
.cap .inp { flex: 1; min-width: 0; letter-spacing: 3px; }
.cap img {
  height: 46px; width: 132px; flex: none; border-radius: 10px;
  border: 1px solid var(--line); background: #F6F9FB; cursor: pointer; object-fit: cover;
  transition: border-color .15s, box-shadow .15s;
}
.cap img:hover { border-color: var(--primary-ring); box-shadow: 0 0 0 3px var(--primary-l); }
.cap-tip { font-size: 12px; color: var(--t3); margin-top: 7px; }

.err {
  min-height: 0; font-size: 13.5px; color: var(--bad);
  background: var(--bad-bg); border-radius: 9px; padding: 0 12px;
  margin-bottom: 14px; line-height: 40px; height: 0; overflow: hidden; transition: height .15s;
}
.err.on { height: auto; min-height: 40px; }

/* 查询列表单与说明并排：表单固定 560，右侧说明自适应 */
.check-grid { display: grid; grid-template-columns: 560px 1fr; gap: 28px; align-items: start; }
.check-aside { display: flex; flex-direction: column; gap: 16px; }
.check-aside .card { padding: 22px 22px 20px; }
.check-aside h3 { margin: 0 0 10px; font-size: 15px; }
.check-aside ul { margin: 0 0 10px; padding-left: 18px; color: var(--t2); font-size: 13.5px; line-height: 1.75; }
.check-aside li { margin: 4px 0; }
.check-aside p { margin: 0; }

/* 查询结果 */
.result {
  margin-top: 24px; max-width: 560px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
}
.result .hd {
  display: flex; align-items: center; gap: 10px;
  padding: 18px 22px; border-bottom: 1px solid var(--line-2);
  font-size: 15px; font-weight: 600;
}
.result .hd .badge { flex: none; }
.result dl { display: grid; grid-template-columns: 92px 1fr; gap: 10px 14px; margin: 0; padding: 20px 22px; font-size: 14px; }
.result dt { color: var(--t3); font-size: 13px; }
.result dd { margin: 0; color: var(--t1); }
.result .tip {
  padding: 16px 22px; background: var(--soft); border-top: 1px solid var(--line-2);
  font-size: 13.5px; color: var(--t2); line-height: 1.75;
}

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  height: 24px; padding: 0 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
}
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
.badge.neutral { background: var(--soft); color: var(--t2); }

/* 下载页 */
.dl-card {
  display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center;
  background: linear-gradient(120deg, #F2FAFC 0%, #FFFFFF 62%);
  border: 1px solid var(--primary-ring); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow-sm);
}
.dl-card h2 { margin: 0 0 8px; font-size: 22px; }
.dl-card .meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13px; color: var(--t3); margin-top: 12px; }
.dl-card .meta span { display: inline-flex; align-items: center; gap: 6px; }
.dl-card .meta i { width: 5px; height: 5px; border-radius: 50%; background: var(--t4); }

.note {
  margin-top: 22px; padding: 18px 20px; border-radius: 12px;
  background: var(--warn-bg); border: 1px solid #F6E3C2; color: #8A5A11;
  font-size: 13.5px; line-height: 1.8;
}
.note b { color: #744A0C; }

/* FAQ / 正文 */
.prose { max-width: 760px; }
.prose h2 { font-size: 21px; margin: 38px 0 12px; letter-spacing: -.2px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 16px; margin: 26px 0 8px; }
.prose p, .prose li { color: var(--t2); font-size: 14.5px; }
.prose ul, .prose ol { padding-left: 20px; }
.prose li { margin: 6px 0; }
.prose code {
  background: var(--soft); border: 1px solid var(--line); border-radius: 5px;
  padding: 1px 6px; font: 12.5px Consolas, monospace; color: var(--t1);
}
.prose .q { padding: 18px 0; border-bottom: 1px solid var(--line-2); }
.prose .q h3 { margin: 0 0 6px; }
.prose .q p { margin: 0; }

/* CTA 带 */
.band {
  background: linear-gradient(120deg, #0B5F78, #1291B0 70%);
  color: #fff; border-radius: var(--radius); padding: 40px 44px;
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  box-shadow: 0 18px 40px rgba(11, 95, 120, .22);
}
.band h2 { margin: 0 0 6px; font-size: 24px; }
.band p { margin: 0; color: #CFEAF2; font-size: 14.5px; }
.band .btn { margin-left: auto; }
.band .btn.pri { background: #fff; color: var(--primary-d); border-color: #fff; box-shadow: none; }
.band .btn.pri:hover { background: #EAF7FA; color: var(--primary-d); }

/* ------------------------------------------------------------------ 更新日志 */
.log-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; align-items: start; }
.log-list { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.log-aside { display: flex; flex-direction: column; gap: 16px; }
.log-aside .card { padding: 22px 24px; }
.log-aside h3 { margin: 0 0 10px; font-size: 15px; }
.log-aside ol, .log-aside ul { margin: 0; padding-left: 20px; color: var(--t2); font-size: 13.5px; line-height: 1.8; }
.log-aside p { margin: 0; font-size: 13.5px; color: var(--t2); line-height: 1.75; }
.log-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow-sm);
}
.log-hd { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.log-hd .ver {
  font: 700 15px/1 Consolas, "Cascadia Mono", monospace;
  color: var(--primary-d); background: var(--primary-l);
  border: 1px solid var(--primary-ring); border-radius: 8px; padding: 6px 10px;
}
.log-body {
  font-size: 14px; color: var(--t2); line-height: 1.85;
  white-space: pre-wrap; word-break: break-word;
}
.log-foot { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line); }

/* ------------------------------------------------------------------ 购买 */
.buy-grid { display: grid; grid-template-columns: 380px 1fr; gap: 28px; align-items: start; }
.buy-card { padding: 30px 26px; }
.buy-tag {
  display: inline-block; font-size: 12px; font-weight: 700; color: var(--primary-d);
  background: var(--primary-l); border: 1px solid var(--primary-ring);
  border-radius: 999px; padding: 4px 12px; margin-bottom: 16px;
}
.price { display: flex; align-items: baseline; gap: 10px; margin-bottom: 20px; }
.price b { font-size: 38px; letter-spacing: -1px; color: var(--t1); }
/* 没配价格时不要显示一个大大的「—」，那看起来像出错了 */
.price-empty { font-size: 15px; color: var(--t2); margin-bottom: 20px; padding: 6px 0; }
.buy-list { list-style: none; padding: 0; margin: 0 0 22px; }
.buy-list li {
  position: relative; padding: 8px 0 8px 24px;
  font-size: 13.5px; color: var(--t2); border-bottom: 1px solid var(--line-2);
}
.buy-list li:last-child { border-bottom: 0; }
.buy-list li::before {
  content: "✓"; position: absolute; left: 2px; top: 8px;
  color: var(--ok); font-weight: 700; font-size: 13px;
}
.buy-note { display: flex; flex-direction: column; gap: 16px; }
.buy-note .card { padding: 22px 24px; }
.buy-note h3 { margin: 0 0 10px; font-size: 15px; }
.buy-note ol, .buy-note ul { margin: 0 0 10px; padding-left: 20px; color: var(--t2); font-size: 13.5px; line-height: 1.8; }
.buy-note li { margin: 4px 0; }
.buy-note p { margin: 0 0 10px; font-size: 13.5px; color: var(--t2); }

/* 通用卡片头（前台版，比后台轻） */
.card-h { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.card-h h2, .card-h h3 { margin: 0; }

/* ------------------------------------------------------------------ 页脚 */
.foot { border-top: 1px solid var(--line); background: #FBFCFD; padding: 46px 0 26px; }
.foot-main { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding-bottom: 30px; }
.foot-brand { max-width: 320px; }
.foot-brand p { margin: 12px 0 0; color: var(--t3); font-size: 13.5px; }
.foot-links { display: flex; gap: 56px; }
.foot-links h4 { margin: 0 0 12px; font-size: 13px; color: var(--t3); font-weight: 600; }
.foot-links a { display: block; color: var(--t2); font-size: 13.5px; padding: 5px 0; }
.foot-links a:hover { color: var(--primary); }
.foot-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 20px; border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--t3);
}

/* ------------------------------------------------------------------ 响应式 */
@media (max-width: 960px) {
  /* 导航在这个宽度已经放不下 7 项 + 下载按钮，提前折叠成抽屉 */
  .links { display: none; }
  .nav .wrap > .btn { display: none; }
  .burger { display: block; }
  .nav .wrap { gap: 12px; height: 60px; }
  .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 40px; padding-top: 52px; padding-bottom: 62px; }
  .mock { transform: none; max-width: 100%; }
  .hero h1 { font-size: 34px; }
  .grid-3, .steps { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .check-grid { grid-template-columns: minmax(0, 1fr); }
  .check-aside { flex-direction: column; }
  .buy-grid { grid-template-columns: minmax(0, 1fr); }
  .log-grid { grid-template-columns: minmax(0, 1fr); }
  /* 单列后表单不要再卡在 560，手机/平板上满宽更好按 */
  .form-card, .result { max-width: 100%; }
  .sec { padding: 60px 0; }
  .dl-card { grid-template-columns: 1fr; }
  .band { padding: 30px 26px; }
  .band .btn { margin-left: 0; }
}

@media (max-width: 720px) {
  .hero h1 { font-size: 28px; letter-spacing: -.3px; }
  .hero .lead { font-size: 15.5px; }
  .hero-facts { gap: 18px; flex-wrap: wrap; }

  /* 视口只有 390 时模拟窗口必须压缩：侧栏收窄、进度条让位、结论条的合计换行 */
  .mock-body { grid-template-columns: minmax(0, 124px) minmax(0, 1fr); min-height: 0; }
  .mock-side { padding: 10px 6px; }
  .mock-row { padding: 6px 4px; font-size: 11px; gap: 4px; }
  /* 侧栏一行放不下就省略号，不要折成「系统占 / 用」两行 */
  .mock-row > span:not(.dot):not(.sz) { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .mock-row .sz { font-size: 10px; flex: none; margin-left: 2px; }
  .mock-main { min-width: 0; }
  .mock-concl .good { white-space: normal; }
  .mock-main { padding: 10px 10px 12px; }
  .mock-concl { font-size: 11px; gap: 6px; padding: 8px 10px; }
  .mock-concl .good { margin-left: 0; width: 100%; }
  .mock-item { padding: 7px 0; font-size: 11px; gap: 6px; }
  .mock-item .bar { display: none; }
  .mock-item .num { font-size: 10px; }
  .mock-item .tag { font-size: 9.5px; padding: 1px 5px; }

  .page-head h1 { font-size: 25px; }
  .form-card { padding: 22px; }
  .cap img { width: 112px; }
  .result dl { grid-template-columns: 80px 1fr; }
  .compare th, .compare td { padding: 12px 14px; font-size: 13px; }
  .foot-links { gap: 32px; }
}

/* ------------------------------------------------- 超宽屏：内容别缩成一条 */
@media (min-width: 1600px) { .wrap { max-width: 1360px; } }
@media (min-width: 2200px) { .wrap { max-width: 1520px; } }

/* 键盘焦点：输入框已有 ring，这里补齐链接 / 按钮 / 分页等可聚焦元素 */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible, .pager a:focus-visible,
.batch-chip:focus-visible {
  outline: 2px solid var(--primary); outline-offset: 2px;
}

/* 前台统一空态 */
.empty { padding: 34px 20px; text-align: center; color: var(--t3); font-size: 13.5px; }
.empty b { display: block; color: var(--t1); font-size: 15px; margin-bottom: 6px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}