/* =========================================================
   买物札记 · 静态介绍站
   纯手写 CSS，无外部字体 / 框架 / 统计脚本
   ========================================================= */

:root {
  color-scheme: light;

  --bg: #FBF6F2;
  --bg-soft: #F7EEE8;
  --panel: #FFFDFB;
  --ink: #2B2226;
  --ink-2: #5D514B;
  --ink-3: #7E6F68;
  --ink-4: #A2938B;

  --pink: #F0829A;
  --rose: #C9344C;
  --rose-deep: #A8243B;
  --peach: #E58B72;
  --gold: #C08A1E;
  --green: #2F7D5C;

  --grad: linear-gradient(135deg, #D4465F 0%, #B12C44 100%);
  --grad-soft: linear-gradient(135deg, rgba(240, 130, 154, .18), rgba(229, 139, 114, .10));

  --glass: rgba(255, 255, 255, .66);
  --glass-strong: rgba(255, 255, 255, .84);
  --line: rgba(84, 56, 46, .10);
  --line-strong: rgba(84, 56, 46, .16);
  --shadow: 0 24px 60px rgba(116, 72, 60, .12);
  --shadow-soft: 0 10px 30px rgba(116, 72, 60, .08);

  --radius: 26px;
  --radius-lg: 34px;
  --container: 1160px;

  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4, p, dl, dd, dt { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

::selection {
  background: rgba(240, 130, 154, .32);
  color: var(--ink);
}

:focus-visible {
  outline: 3px solid rgba(201, 52, 76, .45);
  outline-offset: 3px;
  border-radius: 8px;
}

section[id] { scroll-margin-top: 104px; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px; left: 12px;
  z-index: 999;
  padding: 10px 16px;
  border-radius: 12px;
  background: var(--ink);
  color: var(--bg);
  transform: translateY(-160%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.icon {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- 背景装饰 ---------- */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(58% 46% at 78% 4%, rgba(240, 130, 154, .16), transparent 70%),
    radial-gradient(46% 38% at 8% 18%, rgba(229, 139, 114, .14), transparent 72%),
    var(--bg);
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .55;
  animation: blobFloat 16s ease-in-out infinite alternate;
}
.blob-a {
  width: 420px; height: 420px;
  top: -120px; right: -100px;
  background: radial-gradient(circle, rgba(240, 130, 154, .55), transparent 68%);
}
.blob-b {
  width: 380px; height: 380px;
  top: 46%; left: -160px;
  background: radial-gradient(circle, rgba(229, 139, 114, .42), transparent 68%);
  animation-delay: -6s;
}
.blob-c {
  width: 320px; height: 320px;
  bottom: -120px; right: 18%;
  background: radial-gradient(circle, rgba(231, 180, 90, .26), transparent 68%);
  animation-delay: -11s;
}

.grid-fade {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(84, 56, 46, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(84, 56, 46, .045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .55), transparent 62%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .55), transparent 62%);
}

@keyframes blobFloat {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(24px, 32px, 0) scale(1.08); }
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 14px 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 66px;
  padding: 10px 14px 10px 20px;
  border: 1px solid rgba(255, 255, 255, .72);
  border-radius: 22px;
  background: var(--glass);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px) saturate(1.45);
  -webkit-backdrop-filter: blur(18px) saturate(1.45);
  transition: background .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled .nav {
  background: var(--glass-strong);
  box-shadow: 0 14px 36px rgba(116, 72, 60, .14);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 14px;
  background: var(--grad);
  color: #fff;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 1px;
  box-shadow: 0 10px 22px rgba(201, 52, 76, .28);
}
.brand-copy { display: flex; flex-direction: column; line-height: 1.2; }
.brand-copy strong { font-size: 17px; letter-spacing: 2px; }
.brand-copy small { margin-top: 3px; font-size: 11px; color: var(--ink-3); letter-spacing: 1px; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-menu > a {
  padding: 9px 13px;
  border-radius: 11px;
  font-size: 14px;
  color: var(--ink-2);
  transition: color .2s ease, background .2s ease;
}
.nav-menu > a:hover { color: var(--ink); background: rgba(240, 130, 154, .10); }
.nav-menu > a.nav-cta {
  margin-left: 6px;
  padding: 10px 18px;
  font-weight: 600;
  color: #fff;
  background: var(--grad);
  box-shadow: 0 8px 18px rgba(201, 52, 76, .24);
}
.nav-menu > a.nav-cta:hover { color: #fff; background: var(--grad); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  place-items: center;
  width: 44px; height: 44px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, .5);
  cursor: pointer;
}
.nav-toggle .icon { width: 22px; height: 22px; }

/* ---------- 通用文字 / 按钮 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.6px;
  color: var(--rose);
}
.eyebrow-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 0 4px rgba(240, 130, 154, .16);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: 15px;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn .icon { width: 18px; height: 18px; }
.btn-primary {
  color: #fff;
  background: var(--grad);
  box-shadow: 0 14px 30px rgba(201, 52, 76, .26);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 38px rgba(201, 52, 76, .32);
}
.btn-ghost {
  color: var(--ink-2);
  background: rgba(255, 255, 255, .56);
  border-color: var(--line-strong);
}
.btn-ghost:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, .82);
  border-color: rgba(201, 52, 76, .28);
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--rose);
  border-bottom: 1px solid rgba(201, 52, 76, .28);
  padding-bottom: 2px;
  transition: border-color .2s ease, color .2s ease;
}
.text-link .icon { width: 16px; height: 16px; }
.text-link:hover { color: var(--rose-deep); border-color: var(--rose-deep); }

/* ---------- 首屏 ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(0, .97fr);
  gap: 56px;
  align-items: center;
  padding-top: 58px;
  padding-bottom: 38px;
}

.hero h1 {
  margin-top: 22px;
  font-family: var(--font-display);
  font-size: clamp(2.45rem, 4.6vw, 4.15rem);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -1px;
}
.ink-gradient { color: var(--rose); }
.nowrap { white-space: nowrap; }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .ink-gradient {
    background: linear-gradient(118deg, #C9344C 0%, #E0755C 52%, #B8801B 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }
}

.hero .lead {
  max-width: 580px;
  margin-top: 24px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 28px;
}
.hero-points li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--ink-3);
}
.hero-points .icon {
  width: 15px; height: 15px;
  color: var(--green);
  stroke-width: 2.4;
}

/* ---------- 手机模型 ---------- */
.hero-visual { position: relative; }

.phone-wrap {
  position: relative;
  width: min(100%, 372px);
  margin: 0 auto;
  padding: 18px 12px;
}

.phone {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 18.4;
  padding: 9px;
  border-radius: 48px;
  background: linear-gradient(160deg, #3A2C33, #1E171B 70%);
  box-shadow:
    0 44px 90px rgba(88, 48, 42, .26),
    0 12px 26px rgba(88, 48, 42, .16),
    inset 0 1px 1px rgba(255, 255, 255, .22);
}
.phone-speaker {
  position: absolute;
  top: 17px; left: 50%;
  z-index: 3;
  width: 74px; height: 20px;
  border-radius: 999px;
  background: #1A1318;
  transform: translateX(-50%);
}
.phone-screen {
  position: relative;
  height: 100%;
  padding: 12px 13px 18px;
  overflow: hidden;
  border-radius: 40px;
  background:
    radial-gradient(110% 55% at 88% -8%, rgba(240, 130, 154, .26), transparent 62%),
    #FBF7F4;
  color: #2B2226;
}

.app-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 8px 8px;
  font-size: 10px;
  font-weight: 600;
  color: #6A5A53;
}
.app-status-dots { display: flex; gap: 3px; }
.app-status-dots i {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #8E7C74;
}
.app-status-dots i:nth-child(2) { opacity: .72; }
.app-status-dots i:nth-child(3) { opacity: .45; }

.app-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 4px 12px;
}
.app-head strong {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #2B2226;
}
.app-head-icon {
  display: grid;
  place-items: center;
  width: 28px; height: 28px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .8);
  border: 1px solid rgba(84, 56, 46, .08);
  color: #7B6A62;
}
.app-head-icon .icon { width: 14px; height: 14px; }

.app-search {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .82);
  border: 1px solid rgba(84, 56, 46, .08);
  font-size: 10px;
  color: #9A8A82;
}
.app-search .icon { width: 13px; height: 13px; }

.app-chips {
  display: flex;
  gap: 6px;
  margin: 10px 0 11px;
  overflow: hidden;
}
.app-chips span {
  flex: none;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(84, 56, 46, .07);
  font-size: 9px;
  color: #7C6B63;
}
.app-chips .on {
  color: #fff;
  background: linear-gradient(135deg, #D4465F, #B12C44);
  border-color: transparent;
}

.app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.app-card {
  padding: 6px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .78);
  border: 1px solid rgba(255, 255, 255, .9);
  box-shadow: 0 6px 14px rgba(116, 72, 60, .06);
}
.app-thumb {
  position: relative;
  height: 66px;
  border-radius: 10px;
  overflow: hidden;
}
.app-thumb::before,
.app-thumb::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, .34);
}
.app-thumb::before { width: 58px; height: 58px; right: -18px; top: -20px; }
.app-thumb::after { width: 30px; height: 30px; left: -10px; bottom: -12px; }
.thumb-1 { background: linear-gradient(145deg, #F3C4AE, #D98B78); }
.thumb-2 { background: linear-gradient(145deg, #E8D8C8, #BFA48F); }
.thumb-3 { background: linear-gradient(145deg, #D8DCE6, #A8B0C2); }
.thumb-4 { background: linear-gradient(145deg, #E9D3A9, #C9A566); }
.thumb-5 { background: linear-gradient(145deg, #C9C1B4, #9C8E80); }
.thumb-6 { background: linear-gradient(145deg, #D8BBA2, #9E7359); }
.app-thumb-tag {
  position: absolute;
  left: 6px; bottom: 6px;
  z-index: 1;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, .82);
  color: #5D4A43;
  font-size: 7px;
  font-weight: 600;
}
.app-thumb-tag.avoid {
  background: #C9344C;
  color: #fff;
}
.app-card h3 {
  margin-top: 6px;
  font-size: 9.5px;
  font-weight: 600;
  line-height: 1.4;
  color: #352A2E;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.app-cat {
  font-size: 8px;
  color: #A08E85;
}
.app-stars {
  display: flex;
  gap: 1px;
  margin-top: 2px;
  color: #D79A24;
}
.app-stars .icon { width: 8px; height: 8px; fill: currentColor; stroke: none; }
.app-stars .icon.dim { color: rgba(160, 142, 133, .3); }
.app-avoid {
  margin-top: 2px;
  font-size: 7.5px;
  color: #C9344C;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-fab {
  position: absolute;
  right: 16px; bottom: 18px;
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: 13px;
  background: linear-gradient(135deg, #D4465F, #B12C44);
  color: #fff;
  font-size: 22px;
  font-weight: 300;
  box-shadow: 0 10px 20px rgba(201, 52, 76, .34);
}

.float-card {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 15px;
  border-radius: 15px;
  background: rgba(255, 255, 255, .82);
  border: 1px solid rgba(255, 255, 255, .9);
  box-shadow: 0 16px 34px rgba(116, 72, 60, .16);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  animation: floatY 7s ease-in-out infinite;
}
.float-card span:last-child { display: flex; flex-direction: column; line-height: 1.3; }
.float-card strong { font-size: 11.5px; color: var(--ink); }
.float-card small { margin-top: 2px; font-size: 9.5px; color: var(--ink-3); }
.float-icon {
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: 10px;
  background: rgba(240, 130, 154, .16);
  color: var(--rose);
}
.float-icon .icon { width: 16px; height: 16px; }
.float-icon.star { background: rgba(231, 180, 90, .2); color: var(--gold); }
.float-icon.star .icon { fill: currentColor; stroke: none; }
.float-a { top: -18px; left: -34px; }
.float-b { right: -46px; bottom: 118px; animation-delay: -3.4s; }

.float-pill {
  position: absolute;
  left: -52px; bottom: 62px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(47, 125, 92, .1);
  border: 1px solid rgba(47, 125, 92, .18);
  color: var(--green);
  font-size: 10.5px;
  font-weight: 600;
  animation: floatY 8s ease-in-out infinite;
  animation-delay: -1.6s;
}
.float-pill .icon { width: 13px; height: 13px; }

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ---------- 原则条 ---------- */
.trust {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 18px;
  padding: 10px;
  border-radius: 24px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, .72);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 14px 16px;
  border-radius: 16px;
  transition: background .2s ease;
}
.trust-item:hover { background: rgba(255, 255, 255, .46); }
.trust-item > .icon {
  width: 21px; height: 21px;
  color: var(--rose);
  stroke-width: 1.7;
}
.trust-item div { display: flex; flex-direction: column; line-height: 1.35; }
.trust-item strong { font-size: 13px; }
.trust-item span { margin-top: 3px; font-size: 11.5px; color: var(--ink-3); }

/* ---------- 区块 ---------- */
.section { padding-block: 96px; }
.section-tint {
  position: relative;
  background: linear-gradient(180deg, transparent, rgba(247, 238, 232, .7) 18%, rgba(247, 238, 232, .7) 82%, transparent);
}

.section-head {
  max-width: 720px;
  margin-bottom: 42px;
}
.section-head h2 {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.5px;
  text-wrap: balance;
}
.section-head > p:last-child {
  max-width: 600px;
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-2);
}

/* ---------- 功能 Bento ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.feature {
  grid-column: span 3;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 26px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, .78);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.feature:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: rgba(240, 130, 154, .34);
}
.feature-wide {
  grid-column: span 6;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.feature-copy { min-width: 0; }

.feature-icon {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  margin-bottom: 16px;
  border-radius: 13px;
  background: var(--grad-soft);
  border: 1px solid rgba(240, 130, 154, .18);
  color: var(--rose);
}
.feature-icon .icon { width: 20px; height: 20px; }
.feature h3 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .3px;
}
.feature p {
  margin-top: 7px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

.photo-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
}
.photo {
  display: block;
  width: 54px; height: 72px;
  border-radius: 14px;
  box-shadow: 0 8px 18px rgba(116, 72, 60, .14);
}
.photo.p1 { background: linear-gradient(145deg, #F3C4AE, #D98B78); transform: rotate(-6deg); }
.photo.p2 { background: linear-gradient(145deg, #D8DCE6, #A8B0C2); transform: translateY(-4px); }
.photo.p3 { background: linear-gradient(145deg, #E9D3A9, #C9A566); transform: rotate(5deg); }
.photo-meta {
  position: absolute;
  right: 24px; bottom: 22px;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid var(--line);
  font-size: 9px;
  color: var(--ink-3);
}

.rating-demo {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: auto;
  padding-top: 18px;
}
.stars { display: flex; gap: 2px; color: var(--gold); }
.stars .icon { width: 15px; height: 15px; fill: currentColor; stroke: none; }
.rating-label {
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(231, 180, 90, .16);
  color: #8E6411;
  font-size: 10px;
  font-weight: 600;
}

.tag-demo {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 18px;
}
.tag-demo span {
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(240, 130, 154, .1);
  border: 1px solid rgba(240, 130, 154, .16);
  color: #A53A50;
  font-size: 10.5px;
}

.search-demo {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: auto;
  padding: 9px 11px;
  border-radius: 11px;
  background: rgba(255, 255, 255, .66);
  border: 1px solid var(--line);
  font-size: 11px;
  color: var(--ink-3);
}
.search-demo .icon { width: 13px; height: 13px; }
.search-demo .caret {
  width: 1.5px; height: 13px;
  margin-left: 1px;
  background: var(--rose);
  animation: caretBlink 1.1s steps(1) infinite;
}
@keyframes caretBlink { 50% { opacity: 0; } }

.backup-demo {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-top: 18px;
  color: var(--ink-3);
}
.backup-demo .icon { width: 14px; height: 14px; }
.file-chip {
  padding: 4px 8px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .68);
  border: 1px solid var(--line);
  font-size: 9.5px;
  color: var(--ink-2);
}
.file-chip.done {
  background: rgba(47, 125, 92, .1);
  border-color: rgba(47, 125, 92, .18);
  color: var(--green);
}

.cloud-demo {
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 210px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .56);
  border: 1px solid var(--line);
}
.cloud-line {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 10.5px;
  color: var(--ink-2);
}
.cloud-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--rose);
  box-shadow: 0 0 0 3px rgba(201, 52, 76, .12);
}
.cloud-dot.soft {
  background: var(--pink);
  box-shadow: 0 0 0 3px rgba(240, 130, 154, .12);
}
.cloud-arrow { margin: 0 1px; color: var(--ink-4); }

/* ---------- 三步 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.step {
  position: relative;
  padding: 30px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, .78);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease;
}
.step:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.step-num {
  position: absolute;
  top: 16px; right: 20px;
  font-family: var(--font-display);
  font-size: 54px;
  font-weight: 700;
  line-height: 1;
  color: rgba(201, 52, 76, .1);
  letter-spacing: -2px;
}
.step-icon {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: var(--grad-soft);
  border: 1px solid rgba(240, 130, 154, .18);
  color: var(--rose);
}
.step-icon .icon { width: 21px; height: 21px; }
.step h3 { font-size: 18px; font-weight: 700; }
.step p { margin-top: 8px; font-size: 14px; line-height: 1.75; color: var(--ink-2); }

.tip-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 18px;
  padding: 18px 22px;
  border-radius: 18px;
  background: linear-gradient(120deg, rgba(240, 130, 154, .12), rgba(231, 180, 90, .1));
  border: 1px solid rgba(240, 130, 154, .18);
}
.tip-card > .icon { width: 18px; height: 18px; margin-top: 3px; color: var(--rose); fill: rgba(201, 52, 76, .12); }
.tip-card p { font-size: 13.5px; color: var(--ink-2); }
.tip-card strong { color: var(--ink); }

/* ---------- 隐私 ---------- */
.privacy-panel {
  display: grid;
  grid-template-columns: 1fr 1.08fr;
  gap: 30px 40px;
  padding: 48px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(80% 80% at 100% 0%, rgba(240, 130, 154, .16), transparent 64%),
    var(--glass-strong);
  border: 1px solid rgba(255, 255, 255, .82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px) saturate(1.3);
  -webkit-backdrop-filter: blur(22px) saturate(1.3);
}
.privacy-main h2 {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3vw, 2.7rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.5px;
  text-wrap: balance;
}
.privacy-lead {
  margin-top: 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}
.privacy-main .text-link { margin-top: 22px; }

.privacy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.privacy-item {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, .58);
  border: 1px solid rgba(255, 255, 255, .74);
  transition: background .2s ease, transform .2s ease;
}
.privacy-item:hover { background: rgba(255, 255, 255, .78); transform: translateY(-2px); }
.privacy-icon {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  margin-bottom: 12px;
  border-radius: 11px;
  background: rgba(240, 130, 154, .12);
  color: var(--rose);
}
.privacy-icon .icon { width: 17px; height: 17px; }
.privacy-item h3 { font-size: 14px; font-weight: 700; }
.privacy-item p { margin-top: 5px; font-size: 12px; line-height: 1.7; color: var(--ink-2); }

.privacy-nope {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.privacy-nope h3 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--ink-3);
}
.privacy-nope ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 12px;
}
.privacy-nope li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--ink-2);
}
.privacy-nope .icon {
  width: 13px; height: 13px;
  color: var(--ink-4);
  stroke-width: 2.2;
}

/* ---------- 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: 44px;
  align-items: start;
}
.about-copy h2 {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.4vw, 2.9rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.5px;
  text-wrap: balance;
}
.about-copy > p {
  max-width: 590px;
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-2);
}

.meta-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 30px;
  border-top: 1px solid var(--line);
}
.meta-list > div {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.meta-list > div:nth-child(odd) { padding-right: 20px; }
.meta-list > div:nth-child(even) { padding-left: 20px; border-left: 1px solid var(--line); }
.meta-list dt { flex: none; font-size: 12px; color: var(--ink-3); }
.meta-list dd { font-size: 13px; font-weight: 600; color: var(--ink); }

.compliance-card {
  position: relative;
  padding: 30px;
  border-radius: var(--radius);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(240, 130, 154, .22), transparent 62%),
    linear-gradient(160deg, #36282E, #231A1F);
  color: #FBF1EB;
  box-shadow: 0 30px 60px rgba(60, 32, 34, .22);
  overflow: hidden;
}
.compliance-card::after {
  content: "";
  position: absolute;
  right: -50px; bottom: -70px;
  width: 190px; height: 190px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .08);
  box-shadow: 0 0 0 26px rgba(255, 255, 255, .03), 0 0 0 52px rgba(255, 255, 255, .02);
  pointer-events: none;
}
.compliance-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .12);
  font-size: 10.5px;
  letter-spacing: 1px;
  color: #F3C9CF;
}
.compliance-badge .icon { width: 13px; height: 13px; }
.compliance-card h3 {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
}
.compliance-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 18px;
}
.compliance-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(251, 241, 235, .78);
}
.compliance-list .icon {
  width: 15px; height: 15px;
  margin-top: 3px;
  color: #F3A8B5;
  stroke-width: 2.4;
}
.compliance-foot {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: 11px;
  line-height: 1.65;
  color: rgba(251, 241, 235, .55);
}
.compliance-foot .icon { width: 14px; height: 14px; margin-top: 2px; }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 30px;
  padding: 60px 0 26px;
  background:
    radial-gradient(60% 80% at 12% 0%, rgba(240, 130, 154, .12), transparent 68%),
    #241B20;
  color: #F4E8E2;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .6fr 1fr;
  gap: 44px;
  padding-bottom: 40px;
}
.footer-brand .brand-mark {
  box-shadow: 0 10px 22px rgba(0, 0, 0, .26);
}
.footer-brand .brand-copy small { color: rgba(244, 232, 226, .55); }
.footer-brand p {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(244, 232, 226, .58);
}
.footer-nav, .footer-legal { display: flex; flex-direction: column; align-items: flex-start; }
.footer-nav h3, .footer-legal h3 {
  margin-bottom: 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.6px;
  color: rgba(244, 232, 226, .42);
}
.footer-nav a {
  padding: 4px 0;
  font-size: 13px;
  color: rgba(244, 232, 226, .76);
  transition: color .2s ease;
}
.footer-nav a:hover { color: #fff; }
.footer-legal p {
  margin-bottom: 6px;
  font-size: 12px;
  color: rgba(244, 232, 226, .6);
}
.icp-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: rgba(244, 232, 226, .82);
  border-bottom: 1px solid rgba(244, 232, 226, .2);
  transition: color .2s ease, border-color .2s ease;
}
.icp-link:hover { color: #fff; border-color: rgba(255, 255, 255, .6); }
.icp-link .icon { width: 12px; height: 12px; }
.footer-note { margin-top: 10px !important; font-size: 11px !important; color: rgba(244, 232, 226, .4) !important; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 11.5px;
  color: rgba(244, 232, 226, .44);
}
.footer-bottom a { color: rgba(244, 232, 226, .62); }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .sep { margin: 0 8px; color: rgba(244, 232, 226, .26); }

/* ---------- 文档页 ---------- */
.doc-hero {
  padding: 56px 0 26px;
}
.doc-hero .eyebrow { margin-bottom: 16px; }
.doc-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -.5px;
}
.doc-hero p {
  max-width: 680px;
  margin-top: 14px;
  font-size: 15px;
  color: var(--ink-2);
}

.doc-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
  padding-bottom: 90px;
}
.doc-toc {
  position: sticky;
  top: 108px;
  padding: 20px;
  border-radius: 18px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, .72);
  box-shadow: var(--shadow-soft);
}
.doc-toc h2 {
  margin-bottom: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.6px;
  color: var(--ink-3);
}
.doc-toc a {
  display: block;
  padding: 5px 0;
  font-size: 12.5px;
  color: var(--ink-2);
  transition: color .2s ease;
}
.doc-toc a:hover { color: var(--rose); }

.doc-body {
  padding: 44px 48px;
  border-radius: var(--radius);
  background: var(--glass-strong);
  border: 1px solid rgba(255, 255, 255, .82);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.doc-body section + section { margin-top: 34px; padding-top: 30px; border-top: 1px solid var(--line); }
.doc-body h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
}
.doc-body h3 {
  margin-top: 18px;
  font-size: 15px;
  font-weight: 700;
}
.doc-body p, .doc-body li {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-2);
}
.doc-body ul, .doc-body ol { margin-top: 8px; padding-left: 1.2em; }
.doc-body ul { list-style: disc; }
.doc-body ol { list-style: decimal; }
.doc-body li { margin-top: 5px; }
.doc-body strong { color: var(--ink); }
.doc-body a { color: var(--rose); border-bottom: 1px solid rgba(201, 52, 76, .26); }
.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-top: 18px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(240, 130, 154, .07);
  border: 1px solid rgba(240, 130, 154, .12);
  font-size: 12px;
  color: var(--ink-3);
}
.doc-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-left: 3px solid var(--pink);
  border-radius: 0 12px 12px 0;
  background: rgba(240, 130, 154, .07);
}
.doc-note p { margin: 0; font-size: 13px; }
.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 28px;
  font-size: 13px;
  font-weight: 600;
  color: var(--rose);
}
.doc-back .icon { width: 15px; height: 15px; transform: rotate(180deg); }

/* ---------- 进入动画 ----------
   注意：默认必须保持可见。只有拿到 .is-visible 才播放动画，
   避免无 JS / 截图 / 打印场景把正文藏在 opacity:0 里。 */
.js .reveal.is-visible {
  animation: revealIn .65s cubic-bezier(.22, 1, .36, 1) both;
  animation-delay: var(--delay, 0ms);
}
@keyframes revealIn {
  from { transform: translateY(12px); }
  to   { transform: translateY(0); }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1040px) {
  .hero { gap: 30px; }
  .float-a { left: -20px; top: -14px; }
  .float-pill { left: -34px; }
  .float-b { right: -16px; }
  .feature { padding: 22px; }
  .feature-wide { gap: 18px; }
  .photo { width: 46px; height: 62px; }
  .cloud-demo { min-width: 180px; }
}

@media (max-width: 900px) {
  .nav-toggle { display: grid; }
  .nav-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0; right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px;
    border-radius: 18px;
    background: var(--panel);
    border: 1px solid rgba(255, 255, 255, .9);
    box-shadow: var(--shadow);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s;
  }
  .nav-menu > a { padding: 12px 14px; font-size: 14px; }
  .nav-menu > a.nav-cta { margin: 4px 0 0; text-align: center; }
  .nav.open .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav { position: relative; }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 42px;
    gap: 36px;
  }
  .hero-copy { max-width: 680px; }
  .hero-visual { order: 2; }
  .phone-wrap { width: min(100%, 340px); }
  .float-a { left: 0; }
  .float-b { display: none; }
  .float-pill { display: none; }

  .bento { gap: 14px; }
  .feature, .feature-wide { grid-column: span 6; }
  .feature-wide { flex-direction: column; align-items: flex-start; }
  .feature-wide .feature-visual,
  .feature-wide .cloud-demo { width: 100%; }
  .photo-meta { position: static; margin-left: 4px; }
  .cloud-demo { min-width: 0; }

  .steps { grid-template-columns: 1fr; }
  .privacy-panel { grid-template-columns: 1fr; padding: 36px; }
  .privacy-grid { grid-row: auto; }
  .about-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .doc-layout { grid-template-columns: 1fr; gap: 24px; }
  .doc-toc { position: static; display: flex; flex-wrap: wrap; gap: 4px 16px; }
  .doc-toc h2 { width: 100%; }
  .doc-toc a { padding: 2px 0; }
}

@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .section { padding-block: 72px; }
  .site-header { padding: 10px 0; }
  .nav { min-height: 60px; padding: 8px 10px 8px 14px; }
  .brand-mark { width: 40px; height: 40px; border-radius: 12px; font-size: 19px; }
  .brand-copy strong { font-size: 15px; }
  .brand-copy small { font-size: 10px; }

  .hero h1 { letter-spacing: -.5px; }
  .hero .lead { font-size: 15.5px; }
  .hero-actions .btn { flex: 1; }
  .hero-points { display: grid; gap: 7px; }

  .trust { grid-template-columns: 1fr 1fr; }
  .trust-item { padding: 12px; }
  .trust-item span { font-size: 10.5px; }

  .feature, .feature-wide { grid-column: 1 / -1; }
  .feature-wide { padding: 24px; }
  .feature { min-height: 0; }
  .photo-strip { margin-top: 8px; }

  .privacy-panel { padding: 28px 22px; border-radius: 26px; }
  .privacy-grid { grid-template-columns: 1fr 1fr; }
  .privacy-item { padding: 14px; }

  .meta-list { grid-template-columns: 1fr; }
  .meta-list > div:nth-child(odd) { padding-right: 0; }
  .meta-list > div:nth-child(even) { padding-left: 0; border-left: 0; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 28px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .doc-hero { padding-top: 38px; }
  .doc-body { padding: 28px 22px; }
  .doc-body h2 { font-size: 20px; }
}

@media (max-width: 520px) {
  .phone-wrap { width: min(100%, 310px); padding: 12px 4px; }
  .float-a { top: -12px; left: -6px; }
  .float-b { right: -8px; bottom: 96px; }
  .float-pill { left: -4px; bottom: 44px; }
  .float-card { padding: 9px 11px; }
  .float-card strong { font-size: 10px; }
  .float-card small { font-size: 8.5px; }
  .float-icon { width: 28px; height: 28px; }

  .trust { grid-template-columns: 1fr; }
  .privacy-grid { grid-template-columns: 1fr; }
  .photo { width: 50px; height: 68px; }
  .step { padding: 24px; }
}

/* ---------- 深色模式 ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #171318;
    --bg-soft: #1D181E;
    --panel: #241E25;
    --ink: #F7EFEA;
    --ink-2: #CDBFB8;
    --ink-3: #A2938B;
    --ink-4: #7E716B;

    --glass: rgba(42, 35, 44, .64);
    --glass-strong: rgba(42, 35, 44, .84);
    --line: rgba(255, 255, 255, .09);
    --line-strong: rgba(255, 255, 255, .16);
    --shadow: 0 24px 60px rgba(0, 0, 0, .38);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, .26);
    --grad-soft: linear-gradient(135deg, rgba(240, 130, 154, .16), rgba(229, 139, 114, .08));
  }

  .page-bg {
    background:
      radial-gradient(58% 46% at 78% 4%, rgba(240, 130, 154, .15), transparent 70%),
      radial-gradient(46% 38% at 8% 18%, rgba(229, 139, 114, .09), transparent 72%),
      var(--bg);
  }
  .grid-fade { opacity: .5; }
  .blob { opacity: .34; }
  .nav { border-color: rgba(255, 255, 255, .1); }
  .nav-menu > a:hover { background: rgba(240, 130, 154, .12); }
  .nav-toggle { background: rgba(255, 255, 255, .06); }
  .btn-ghost { background: rgba(255, 255, 255, .06); }
  .btn-ghost:hover { background: rgba(255, 255, 255, .1); }
  .feature, .step, .doc-body, .doc-toc { border-color: rgba(255, 255, 255, .08); }
  .feature:hover { border-color: rgba(240, 130, 154, .3); }
  .privacy-panel { border-color: rgba(255, 255, 255, .1); }
  .privacy-item { background: rgba(255, 255, 255, .045); border-color: rgba(255, 255, 255, .07); }
  .privacy-item:hover { background: rgba(255, 255, 255, .07); }
  .search-demo, .file-chip, .cloud-demo, .photo-meta { background: rgba(255, 255, 255, .05); }
  .tag-demo span { color: #F0A3B2; }
  .rating-label { color: #E5C079; }
  .doc-meta, .doc-note { background: rgba(240, 130, 154, .08); }
  .compliance-card { background: radial-gradient(90% 70% at 100% 0%, rgba(240, 130, 154, .18), transparent 62%), linear-gradient(160deg, #33252C, #201820); }
  .site-footer { background: radial-gradient(60% 80% at 12% 0%, rgba(240, 130, 154, .08), transparent 68%), #100D11; }
  .float-card { background: rgba(42, 35, 44, .86); border-color: rgba(255, 255, 255, .12); }
  .float-card strong { color: var(--ink); }
  .app-thumb-tag { color: #5D4A43; }
}

@media (max-width: 360px) {
  .hero h1 { font-size: 2.05rem; }
  .eyebrow { font-size: 11.5px; letter-spacing: .8px; }
  .hero .lead { font-size: 14.5px; }
  .hero-actions { gap: 10px; }
  .hero-actions .btn { min-height: 48px; font-size: 14px; }
}

@media (max-width: 900px) and (prefers-color-scheme: dark) {
  .nav-menu {
    background: var(--panel);
    border-color: rgba(255, 255, 255, .1);
  }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js .reveal.is-visible { animation: none; }
}

/* ---------- 打印 ---------- */
@media print {
  .page-bg, .site-header, .hero-visual, .footer-nav, .nav-toggle { display: none !important; }
  body { background: #fff; color: #000; }
  .container { max-width: none; padding: 0; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
  .feature, .step, .privacy-panel, .doc-body { box-shadow: none; border: 1px solid #ddd; background: #fff; }
}