/* ==========================================================================
   奇丸守护 · 应用官网样式表
   设计基调：浅蓝渐变 + 白色卡片 + 蓝色强调（与 APP 视觉一致）
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --brand: #2F6BE4;
  --brand-2: #5B9CF8;
  --brand-3: #9CC6FF;
  --brand-deep: #16336E;
  --ink: #12203C;
  --ink-2: #42557A;
  --ink-3: #7C8DAC;
  --ok: #2F6BE4;
  --warn: #F5940C;
  --danger: #F0453A;
  --bg: #F2F6FF;
  --bg-soft: #F8FBFF;
  --card: #FFFFFF;
  --line: rgba(47, 107, 228, .13);
  --line-2: rgba(47, 107, 228, .07);
  --r-lg: 24px;
  --r-md: 18px;
  --r-sm: 12px;
  --sh-1: 0 6px 20px rgba(26, 66, 150, .06);
  --sh-2: 0 18px 48px rgba(26, 66, 150, .13);
  --sh-3: 0 2px 10px rgba(26, 66, 150, .05);
  --wrap: 1180px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC",
          system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ---------- 2. 基础 ---------- */
* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; border: 0; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-deep); }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
table { border-collapse: collapse; width: 100%; }

::selection { background: rgba(47, 107, 228, .18); }

/* ---------- 3. 布局工具 ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.sec { padding: 92px 0; position: relative; }
.sec--soft { background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-soft) 100%); }
.sec--white { background: #FFFFFF; }

.sec-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.sec-head.left { margin-left: 0; text-align: left; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 600; letter-spacing: .06em;
  color: var(--brand); background: rgba(47, 107, 228, .09);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 16px;
}
.eyebrow i { width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }

.sec-title { font-size: 34px; letter-spacing: -.02em; }
.sec-desc { margin-top: 14px; color: var(--ink-2); font-size: 16px; }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 50px; padding: 0 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; white-space: nowrap;
  transition: transform .25s cubic-bezier(.34, 1.3, .64, 1), box-shadow .25s, background .25s, color .25s;
}
.btn svg { width: 18px; height: 18px; flex: none; }

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand-2) 0%, var(--brand) 55%, #245BCB 100%);
  box-shadow: 0 10px 26px rgba(47, 107, 228, .34);
}
.btn--primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 16px 34px rgba(47, 107, 228, .42); }

.btn--ghost {
  color: var(--brand-deep); background: #fff;
  box-shadow: inset 0 0 0 1.5px var(--line), var(--sh-3);
}
.btn--ghost:hover { color: var(--brand); transform: translateY(-2px); box-shadow: inset 0 0 0 1.5px rgba(47, 107, 228, .35), var(--sh-1); }

.btn--sm { height: 42px; padding: 0 20px; font-size: 14px; }

/* ---------- 5. 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}
.nav.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 22px rgba(26, 66, 150, .06); }

.nav__in { display: flex; align-items: center; gap: 30px; height: 70px; }

.brand { display: flex; align-items: center; gap: 11px; flex: none; }
.brand img { width: 34px; height: 34px; border-radius: 10px; box-shadow: var(--sh-3); }
.brand__txt { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-size: 16.5px; font-weight: 700; color: var(--ink); letter-spacing: .01em; }
.brand__sub { font-size: 10.5px; color: var(--ink-3); letter-spacing: .14em; text-transform: uppercase; }

.nav__menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__menu a {
  display: block; padding: 8px 14px; border-radius: 999px;
  font-size: 14.5px; font-weight: 500; color: var(--ink-2);
  transition: color .2s, background .2s;
}
.nav__menu a:hover { color: var(--brand); background: rgba(47, 107, 228, .07); }
.nav__menu a.is-here { color: var(--brand); font-weight: 600; }
.nav__cta { margin-left: 8px; }

.nav__burger {
  display: none; width: 42px; height: 42px; margin-left: auto;
  border-radius: 12px; border: 1px solid var(--line); background: #fff;
  align-items: center; justify-content: center;
}
.nav__burger span, .nav__burger span::before, .nav__burger span::after {
  content: ""; display: block; width: 17px; height: 1.8px; border-radius: 2px;
  background: var(--ink); transition: transform .3s, opacity .3s;
}
.nav__burger span::before { transform: translateY(-5.5px); }
.nav__burger span::after { transform: translateY(3.7px); }
.nav.is-open .nav__burger span { background: transparent; }
.nav.is-open .nav__burger span::before { transform: rotate(45deg); }
.nav.is-open .nav__burger span::after { transform: rotate(-45deg) translateY(-1.8px); }

.nav__drawer { display: none; }

/* ---------- 6. Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 74px 0 96px; }
.hero::before {
  content: ""; position: absolute; inset: -30% -10% auto -10%; height: 120%;
  background:
    radial-gradient(46% 56% at 18% 26%, rgba(155, 199, 255, .58) 0%, rgba(155, 199, 255, 0) 68%),
    radial-gradient(40% 52% at 82% 12%, rgba(126, 176, 255, .48) 0%, rgba(126, 176, 255, 0) 66%),
    radial-gradient(50% 60% at 62% 88%, rgba(199, 224, 255, .5) 0%, rgba(199, 224, 255, 0) 70%);
  pointer-events: none;
}
.hero__in { position: relative; display: grid; grid-template-columns: 1.04fr .96fr; gap: 56px; align-items: center; }

.hero h1 { font-size: 52px; letter-spacing: -.03em; line-height: 1.14; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--brand) 0%, #6BA6FF 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lead { margin-top: 20px; font-size: 17px; color: var(--ink-2); max-width: 30em; }
.hero__acts { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }

.hero__note { display: flex; align-items: center; gap: 8px; margin-top: 18px; font-size: 13px; color: var(--ink-3); }
.hero__note svg { width: 15px; height: 15px; color: var(--ok); }

/* 体温分级条 */
.levels { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.level {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, .82); border: 1px solid var(--line);
  border-radius: 999px; padding: 8px 16px; font-size: 13.5px; font-weight: 600;
  box-shadow: var(--sh-3); backdrop-filter: blur(6px);
}
.level b { font-weight: 700; color: var(--ink); }
.level span.d {
  width: 9px; height: 9px; border-radius: 50%; flex: none;
  box-shadow: 0 0 0 3.5px rgba(0, 0, 0, .045);
}
.level--ok span.d { background: var(--ok); }
.level--warn span.d { background: var(--warn); }
.level--danger span.d { background: var(--danger); }

/* ---------- 7. 手机样机 ---------- */
.hero__visual { position: relative; display: flex; justify-content: center; }

.phone {
  position: relative; display: inline-block;
  padding: 11px; border-radius: 44px;
  background: linear-gradient(160deg, #26304A 0%, #131A29 60%, #0C111C 100%);
  box-shadow:
    0 34px 70px rgba(19, 42, 90, .28),
    0 0 0 1px rgba(255, 255, 255, .12) inset;
}
.phone::after {
  content: ""; position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  width: 74px; height: 7px; border-radius: 999px; background: rgba(255, 255, 255, .16);
}
.phone__scr {
  position: relative; border-radius: 34px; overflow: hidden;
  background: #EAF2FF; height: 620px; width: 240px;
}
.phone__scr img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: top center;
  opacity: 0; transition: opacity .7s ease;
}
.phone__scr img.is-on { opacity: 1; }
.phone--solo .phone__scr { height: auto; width: auto; background: #EAF2FF; }
.phone--solo .phone__scr img {
  position: static; opacity: 1; height: auto; width: auto;
  max-height: 620px; max-width: 290px; object-fit: contain;
}
.shotstack img { display: none; }
.shotstack img.is-on { display: block; animation: shotIn .45s ease both; }
@keyframes shotIn { from { opacity: 0; transform: scale(.985); } to { opacity: 1; transform: none; } }

/* 浮动信息卡 */
.float {
  position: absolute; z-index: 3;
  background: rgba(255, 255, 255, .94);
  border: 1px solid var(--line);
  border-radius: 16px; padding: 13px 16px;
  box-shadow: var(--sh-2);
  backdrop-filter: blur(10px);
  animation: floaty 5.6s ease-in-out infinite;
}
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-11px); } }

.float--alert { top: 58px; left: -14px; width: 214px; animation-delay: -1.2s; }
.float--signal { bottom: 74px; right: -20px; width: 208px; animation-delay: -2.8s; }

.float__tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 700; letter-spacing: .02em;
  padding: 3px 9px; border-radius: 999px; margin-bottom: 8px;
}
.float__tag--warn { color: #8A5200; background: rgba(245, 148, 12, .16); }
.float__tag--danger { color: #8C1D17; background: rgba(240, 69, 58, .14); }
.float__tag--ok { color: #14427F; background: rgba(47, 107, 228, .13); }
.float__ttl { font-size: 14px; font-weight: 700; color: var(--ink); }
.float__val { font-size: 12.5px; color: var(--ink-3); margin-top: 3px; }
.float__row { display: flex; align-items: center; gap: 9px; }
.float__row .bars { display: flex; align-items: flex-end; gap: 2.5px; height: 16px; }
.float__row .bars i { width: 3.4px; border-radius: 2px; background: var(--brand); }
.float__row .bars i:nth-child(1) { height: 5px; }
.float__row .bars i:nth-child(2) { height: 8.5px; }
.float__row .bars i:nth-child(3) { height: 12px; }
.float__row .bars i:nth-child(4) { height: 15.5px; opacity: .32; }

/* ---------- 8. 数字条 ---------- */
.trustbar {
  margin-top: 74px; background: rgba(255, 255, 255, .78);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 26px 20px; box-shadow: var(--sh-1);
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px;
  backdrop-filter: blur(10px);
}
.trust { text-align: center; padding: 6px 10px; position: relative; }
.trust + .trust::before {
  content: ""; position: absolute; left: 0; top: 20%; height: 60%; width: 1px;
  background: var(--line);
}
.trust strong { display: block; font-size: 25px; color: var(--brand); letter-spacing: -.02em; }
.trust strong small { font-size: 13px; font-weight: 600; margin-left: 2px; }
.trust span { font-size: 13px; color: var(--ink-3); }

/* ---------- 9. 功能卡片 ---------- */
.grid { display: grid; gap: 20px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line-2);
  border-radius: var(--r-lg); padding: 28px 26px;
  box-shadow: var(--sh-1);
  transition: transform .3s cubic-bezier(.34, 1.3, .64, 1), box-shadow .3s, border-color .3s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--brand-2), var(--brand-3));
  opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--sh-2); border-color: var(--line); }
.card:hover::before { opacity: 1; }

.card__ico {
  width: 46px; height: 46px; border-radius: 14px;
  display: grid; place-items: center; margin-bottom: 17px;
  background: linear-gradient(140deg, rgba(91, 156, 248, .16), rgba(47, 107, 228, .08));
  color: var(--brand);
}
.card__ico svg { width: 23px; height: 23px; }
.card h3 { font-size: 17px; margin-bottom: 9px; }
.card p { font-size: 14px; color: var(--ink-2); line-height: 1.72; }
.card__meta { margin-top: 14px; font-size: 12.5px; color: var(--ink-3); display: flex; gap: 8px; flex-wrap: wrap; }
.card__meta i {
  font-style: normal; background: rgba(47, 107, 228, .07); color: var(--brand);
  padding: 3px 10px; border-radius: 999px; font-weight: 600;
}

/* ---------- 10. 界面预览 ---------- */
.gal { display: grid; grid-template-columns: 300px 1fr; gap: 34px; align-items: start; }

.gal__tabs { display: flex; flex-direction: column; gap: 9px; }
.gtab {
  display: flex; align-items: center; gap: 13px; width: 100%; text-align: left;
  padding: 14px 16px; border-radius: 15px; border: 1px solid transparent;
  background: rgba(255, 255, 255, .6);
  transition: background .25s, border-color .25s, transform .25s, box-shadow .25s;
}
.gtab:hover { background: #fff; border-color: var(--line); transform: translateX(3px); }
.gtab.is-on {
  background: #fff; border-color: var(--line);
  box-shadow: var(--sh-1);
}
.gtab__n {
  width: 30px; height: 30px; border-radius: 9px; flex: none;
  display: grid; place-items: center; font-size: 12px; font-weight: 700;
  background: rgba(47, 107, 228, .1); color: var(--brand);
  transition: background .25s, color .25s;
}
.gtab.is-on .gtab__n { background: var(--brand); color: #fff; }
.gtab__t { font-size: 14.5px; font-weight: 600; color: var(--ink); }
.gtab__s { font-size: 12px; color: var(--ink-3); }

.gal__view {
  background: linear-gradient(170deg, #EDF4FF 0%, #F9FBFF 100%);
  border: 1px solid var(--line); border-radius: 30px;
  padding: 42px 34px; display: grid; grid-template-columns: auto 1fr;
  gap: 40px; align-items: center; box-shadow: var(--sh-1);
}
.gal__phone { justify-self: center; }
.gal__phone .phone { padding: 9px; border-radius: 38px; }
.gal__phone .phone::after { display: none; }
.gal__phone .phone__scr { border-radius: 30px; }
.gal__body h3 { font-size: 24px; margin-bottom: 6px; }
.gal__body .sub { font-size: 13.5px; color: var(--brand); font-weight: 600; letter-spacing: .04em; margin-bottom: 20px; }
.gal__body ul { display: flex; flex-direction: column; gap: 13px; }
.gal__body li {
  display: flex; gap: 11px; font-size: 14.5px; color: var(--ink-2); line-height: 1.66;
}
.gal__body li svg { width: 17px; height: 17px; flex: none; margin-top: 4px; color: var(--brand); }
.gal__body li b { color: var(--ink); font-weight: 700; }

.gal__thumbs { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.gthumb {
  width: 62px; border-radius: 11px; overflow: hidden; padding: 0;
  border: 2px solid transparent; box-shadow: var(--sh-3);
  transition: border-color .25s, transform .25s;
}
.gthumb img { width: 100%; height: 62px; object-fit: cover; object-position: top; }
.gthumb:hover { transform: translateY(-3px); }
.gthumb.is-on { border-color: var(--brand); }

/* ---------- 11. 使用流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.steps::before {
  content: ""; position: absolute; top: 33px; left: 12%; right: 12%; height: 1.5px;
  background: repeating-linear-gradient(90deg, var(--line) 0 8px, transparent 8px 16px);
}
.step { text-align: center; position: relative; }
.step__n {
  width: 66px; height: 66px; margin: 0 auto 18px; border-radius: 22px;
  display: grid; place-items: center; font-size: 21px; font-weight: 700;
  background: #fff; color: var(--brand); border: 1px solid var(--line);
  box-shadow: var(--sh-1); position: relative; z-index: 2;
}
.step h3 { font-size: 16px; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--ink-2); }

/* ---------- 12. 表格 ---------- */
.tbl-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--sh-1); }
table.tbl { font-size: 14px; }
table.tbl th, table.tbl td { padding: 15px 22px; text-align: left; vertical-align: top; }
table.tbl thead th {
  background: #EAF1FE; color: var(--brand-deep); font-weight: 700; font-size: 13.5px; letter-spacing: .02em;
  border-bottom: 1px solid var(--line);
}
table.tbl tbody tr + tr td { border-top: 1px solid var(--line-2); }
table.tbl tbody tr:hover td { background: #FAFCFF; }
table.tbl td:first-child { font-weight: 600; color: var(--ink); width: 26%; }
table.tbl td { color: var(--ink-2); }
.tbl code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12.5px; background: rgba(47, 107, 228, .07); color: var(--brand-deep);
  padding: 1.5px 7px; border-radius: 6px;
}

.callout {
  display: flex; gap: 14px; align-items: flex-start;
  background: linear-gradient(135deg, #EAF2FF 0%, #F6FAFF 100%);
  border: 1px solid var(--line); border-left: 3px solid var(--brand);
  border-radius: var(--r-md); padding: 18px 22px; margin-top: 22px;
}
.callout svg { width: 20px; height: 20px; flex: none; color: var(--brand); margin-top: 3px; }
.callout p { font-size: 14px; color: var(--ink-2); }
.callout b { color: var(--ink); }

/* ---------- 13. FAQ ---------- */
.faq { display: flex; flex-direction: column; gap: 12px; max-width: 860px; margin: 0 auto; }
.faq__item {
  background: #fff; border: 1px solid var(--line-2); border-radius: var(--r-md);
  overflow: hidden; transition: border-color .25s, box-shadow .25s;
}
.faq__item.is-open { border-color: var(--line); box-shadow: var(--sh-1); }
.faq__q {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left;
  padding: 19px 22px; font-size: 15.5px; font-weight: 600; color: var(--ink);
}
.faq__q i {
  margin-left: auto; width: 22px; height: 22px; flex: none; border-radius: 50%;
  background: rgba(47, 107, 228, .09); color: var(--brand);
  display: grid; place-items: center; font-style: normal; font-size: 15px; font-weight: 700;
  transition: transform .3s, background .3s, color .3s;
}
.faq__item.is-open .faq__q i { transform: rotate(45deg); background: var(--brand); color: #fff; }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .38s cubic-bezier(.4, 0, .2, 1); }
.faq__a p { padding: 0 22px 21px 22px; font-size: 14.5px; color: var(--ink-2); }

/* ---------- 14. 下载 ---------- */
.dl {
  background: linear-gradient(135deg, #1E5BD8 0%, #2F6BE4 45%, #4E90F5 100%);
  border-radius: 32px; padding: 56px 54px; color: #fff; position: relative; overflow: hidden;
  display: grid; grid-template-columns: 1fr 300px; gap: 44px; align-items: center;
  box-shadow: 0 26px 60px rgba(31, 88, 200, .3);
}
.dl::before, .dl::after {
  content: ""; position: absolute; border-radius: 50%; pointer-events: none;
}
.dl::before { width: 380px; height: 380px; right: -120px; top: -160px; background: rgba(255, 255, 255, .12); }
.dl::after { width: 240px; height: 240px; left: -90px; bottom: -130px; background: rgba(255, 255, 255, .08); }
.dl__body { position: relative; }
.dl h2 { font-size: 32px; letter-spacing: -.02em; }
.dl p { margin-top: 14px; font-size: 15.5px; color: rgba(255, 255, 255, .88); max-width: 30em; }
.dl__acts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.dl .btn--on-light {
  background: #fff; color: var(--brand-deep); box-shadow: 0 10px 24px rgba(8, 34, 84, .2);
}
.dl .btn--on-light:hover { color: var(--brand); transform: translateY(-2px); }
.dl .btn--outline {
  background: rgba(255, 255, 255, .1); color: #fff;
  box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, .45);
}
.dl .btn--outline:hover { background: rgba(255, 255, 255, .18); color: #fff; transform: translateY(-2px); }

.dl__qr {
  position: relative; background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .3); border-radius: 22px;
  padding: 18px; text-align: center; backdrop-filter: blur(6px);
}
.dl__qr .box {
  background: #fff; border-radius: 14px; aspect-ratio: 1; display: grid; place-items: center;
  padding: 16px; color: var(--ink-3); font-size: 12.5px; line-height: 1.6; text-align: center;
}
.dl__qr .box svg { width: 44px; height: 44px; color: var(--brand-3); margin: 0 auto 8px; }
.dl__qr span { display: block; margin-top: 12px; font-size: 12.5px; color: rgba(255, 255, 255, .85); }

/* ---------- 15. 页脚 ---------- */
.foot { background: #0F2547; color: rgba(255, 255, 255, .68); padding: 60px 0 26px; font-size: 13.5px; }
.foot__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 34px; padding-bottom: 40px; }
.foot .brand__name { color: #fff; }
.foot .brand__sub { color: rgba(255, 255, 255, .45); }
.foot__desc { margin-top: 16px; max-width: 24em; line-height: 1.8; }
.foot h4 { color: #fff; font-size: 14.5px; margin-bottom: 15px; }
.foot ul { display: flex; flex-direction: column; gap: 10px; }
.foot a { color: rgba(255, 255, 255, .68); }
.foot a:hover { color: #fff; }
.foot__contact li { display: flex; gap: 9px; align-items: flex-start; }
.foot__contact svg { width: 15px; height: 15px; flex: none; margin-top: 4px; color: var(--brand-3); }
.foot__bot {
  border-top: 1px solid rgba(255, 255, 255, .12); padding-top: 22px;
  display: flex; flex-wrap: wrap; gap: 12px 20px; justify-content: space-between;
  font-size: 12.5px; color: rgba(255, 255, 255, .5);
}
.foot__bot a { color: rgba(255, 255, 255, .5); }
.foot__bot a:hover { color: #fff; }
.foot__links { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- 16. 文档页（隐私政策 / 用户协议 / 关于） ---------- */
.doc-hero {
  background: linear-gradient(170deg, #E9F2FF 0%, #F7FBFF 70%, #FFFFFF 100%);
  padding: 62px 0 46px; border-bottom: 1px solid var(--line-2);
}
.doc-hero .eyebrow { background: rgba(47, 107, 228, .1); }
.doc-hero h1 { font-size: 36px; margin-bottom: 14px; letter-spacing: -.02em; }
.doc-hero .meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.doc-hero .meta span {
  font-size: 12.5px; color: var(--ink-2); background: rgba(255, 255, 255, .85);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px;
}

.doc-wrap { display: grid; grid-template-columns: 250px 1fr; gap: 46px; align-items: start; padding: 52px 0 84px; }

.toc {
  position: sticky; top: 92px;
  background: #fff; border: 1px solid var(--line-2); border-radius: var(--r-md);
  padding: 20px 18px; box-shadow: var(--sh-1);
}
.toc h4 { font-size: 13px; color: var(--ink-3); letter-spacing: .08em; margin-bottom: 12px; }
.toc a {
  display: block; font-size: 13.5px; color: var(--ink-2); padding: 6px 10px;
  border-radius: 8px; border-left: 2px solid transparent;
  transition: background .2s, color .2s, border-color .2s;
}
.toc a:hover { background: rgba(47, 107, 228, .06); color: var(--brand); border-left-color: var(--brand); }

.doc { background: #fff; border: 1px solid var(--line-2); border-radius: var(--r-lg); padding: 44px 48px; box-shadow: var(--sh-1); }
.doc__intro {
  background: linear-gradient(135deg, #F1F7FF 0%, #FAFCFF 100%);
  border-radius: var(--r-md); padding: 20px 24px; margin-bottom: 40px;
  font-size: 14.5px; color: var(--ink-2);
}
.doc h2 {
  font-size: 20px; margin: 42px 0 16px; padding-left: 14px; position: relative;
  scroll-margin-top: 92px;
}
.doc h2:first-of-type { margin-top: 0; }
.doc h2::before {
  content: ""; position: absolute; left: 0; top: .28em; bottom: .28em; width: 3.5px;
  border-radius: 3px; background: linear-gradient(180deg, var(--brand-2), var(--brand));
}
.doc h3 { font-size: 15.5px; margin: 26px 0 10px; color: var(--brand-deep); }
.doc p { font-size: 14.5px; color: var(--ink-2); margin-bottom: 13px; }
.doc ul.li { margin: 6px 0 16px; display: flex; flex-direction: column; gap: 9px; }
.doc ul.li li {
  position: relative; padding-left: 20px; font-size: 14.5px; color: var(--ink-2); line-height: 1.75;
}
.doc ul.li li::before {
  content: ""; position: absolute; left: 5px; top: .68em; width: 5px; height: 5px;
  border-radius: 50%; background: var(--brand-3);
}
.doc ul.li li b, .doc p b { color: var(--ink); font-weight: 700; }
.doc .tbl-wrap { margin: 18px 0 24px; box-shadow: none; }
.doc table.tbl th, .doc table.tbl td { padding: 12px 16px; font-size: 13.5px; }
.doc .callout { margin: 20px 0 24px; }
.doc__foot {
  margin-top: 46px; padding-top: 26px; border-top: 1px dashed var(--line);
  font-size: 13.5px; color: var(--ink-3);
}
.doc__foot b { color: var(--ink-2); }

/* 占位标记（正式上线前替换） */
.fill {
  background: rgba(245, 148, 12, .16); color: #8A5200;
  padding: 1px 7px; border-radius: 6px; font-size: 13px; font-weight: 600;
  white-space: nowrap;
}

/* ---------- 17. 滚动动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .75s cubic-bezier(.2, .7, .3, 1), transform .75s cubic-bezier(.2, .7, .3, 1); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .hero__in { grid-template-columns: 1fr; gap: 56px; }
  .hero h1 { font-size: 44px; }
  .hero__visual { order: 2; }
  .trustbar { grid-template-columns: repeat(3, 1fr); }
  .trust:nth-child(4)::before { display: none; }
  .gal { grid-template-columns: 1fr; }
  .gal__tabs { flex-direction: row; overflow-x: auto; padding-bottom: 6px; }
  .gtab { min-width: 172px; }
  .gal__view { grid-template-columns: 1fr; gap: 30px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps::before { display: none; }
  .dl { grid-template-columns: 1fr; padding: 42px 32px; }
  .foot__top { grid-template-columns: 1fr 1fr; }
  .doc-wrap { grid-template-columns: 1fr; gap: 26px; }
  .toc { position: static; }
  .toc a { display: inline-block; margin: 0 4px 4px 0; }
}

@media (max-width: 820px) {
  .nav__menu { display: none; }
  .nav__burger { display: flex; }
  .nav__drawer {
    display: block; overflow: hidden; max-height: 0;
    transition: max-height .38s cubic-bezier(.4, 0, .2, 1);
    border-top: 1px solid transparent;
  }
  .nav.is-open .nav__drawer { max-height: 380px; border-top-color: var(--line); }
  .nav__drawer nav { display: flex; flex-direction: column; padding: 14px 24px 22px; gap: 2px; }
  .nav__drawer a { padding: 12px 4px; font-size: 15px; color: var(--ink); border-radius: 10px; }
  .nav__drawer a:hover { background: rgba(47, 107, 228, .06); }
  .nav__drawer .btn { margin-top: 12px; }
}

@media (max-width: 700px) {
  body { font-size: 15.5px; }
  .sec { padding: 66px 0; }
  .sec-title { font-size: 26px; }
  .hero { padding: 46px 0 62px; }
  .hero h1 { font-size: 34px; }
  .hero__lead { font-size: 15.5px; }
  .hero__acts .btn { flex: 1 1 100%; }
  .trustbar { grid-template-columns: 1fr 1fr; }
  .trust + .trust::before { display: none; }
  .grid--3, .grid--4, .grid--2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 26px; }
  .step { display: flex; gap: 18px; text-align: left; align-items: flex-start; }
  .step__n { margin: 0; width: 52px; height: 52px; border-radius: 17px; font-size: 18px; flex: none; }
  .gal__view { padding: 26px 18px; }
  .gal__body h3 { font-size: 20px; }
  .phone--solo .phone__scr img { max-height: 470px; max-width: 220px; }
  .dl { padding: 34px 24px; border-radius: 24px; }
  .dl h2 { font-size: 25px; }
  .dl__acts .btn { flex: 1 1 100%; }
  .foot__top { grid-template-columns: 1fr; gap: 30px; }
  .doc { padding: 28px 20px; border-radius: var(--r-md); }
  .doc-hero { padding: 42px 0 34px; }
  .doc-hero h1 { font-size: 27px; }
  .phone__scr { width: 206px; height: 532px; }
  .float--alert { left: -6px; width: 186px; }
  .float--signal { right: -6px; width: 184px; }
  table.tbl th, table.tbl td { padding: 12px 14px; }
  .tbl-scroll { overflow-x: auto; }
  .tbl-scroll table.tbl { min-width: 620px; }
}

@media (max-width: 420px) {
  .wrap { padding: 0 18px; }
  .hero h1 { font-size: 30px; }
  .phone__scr { width: 180px; height: 464px; }
  .phone--solo .phone__scr img { max-height: 440px; max-width: 240px; }
  .float { display: none; }
}