/* ============================================================================
   公众号备份与查看工具 — 官网
   方向：archive desk（档案工作台）
     暖纸为地，深墨为带；衬线只做"宣言句"，界面字负责可读，等宽字负责数据。
     层次来自三件事：三档纸面色阶 + 发丝线 + 真实截图被"摆"在台面上（不是飘在空场里）。
   动效：入场分级 / 滚动视差 / 进度条填充 / 计数器 / 走马灯 / 手风琴 / 指针倾斜。
   ========================================================================== */

/* ---------------------------------------------------------------- tokens */
:root {
  --pad: clamp(20px, 4vw, 48px);
  --maxw: 1240px;
  --sect-y: clamp(62px, 7.2vw, 104px);

  --r-sm: 9px;
  --r: 14px;
  --r-lg: 18px;

  --display: "Noto Serif SC", "Songti SC", Georgia, serif;
  --ui: "Microsoft YaHei UI", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --t-xs: 12px;
  --t-sm: clamp(13px, 0.79rem + 0.1vw, 14px);
  --t-body: clamp(16px, 0.99rem + 0.18vw, 17.5px);
  --t-lead: clamp(17.5px, 1.04rem + 0.5vw, 21px);
  --t-h3: clamp(20px, 1.1rem + 0.45vw, 24px);
  --t-h2: clamp(28px, 1.45rem + 2.1vw, 46px);
  --t-h1: clamp(36px, 1.5rem + 4.4vw, 72px);
}

:root, :root[data-theme="light"] {
  --paper: #f4f2ea;
  --paper-2: #fffdf6;
  --paper-3: #eae7db;
  --ink: #15140f;
  --ink-2: #3a362b;
  --muted: #6e6957;

  --line: rgba(21, 20, 15, 0.13);
  --line-2: rgba(21, 20, 15, 0.07);

  --green: #07c160;
  --green-deep: #057a3c;
  --green-ink: #052a1a;
  --green-tint: rgba(7, 193, 96, 0.12);

  --glass: rgba(244, 242, 234, 0.78);

  --band: #0d1611;
  --band-ink: #f2f4ec;

  --sh-1: 0 1px 2px rgba(21, 20, 15, 0.05), 0 6px 16px -12px rgba(21, 20, 15, 0.25);
  --sh-2: 0 2px 4px rgba(21, 20, 15, 0.04), 0 24px 48px -30px rgba(21, 20, 15, 0.4);
  --sh-3: 0 40px 90px -50px rgba(4, 10, 7, 0.75), 0 8px 20px -12px rgba(4, 10, 7, 0.3);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #11130e;
  --paper-2: #191c16;
  --paper-3: #0b0d09;
  --ink: #f3f1e7;
  --ink-2: #cfcbbc;
  --muted: #9e9a88;

  --line: rgba(243, 241, 231, 0.15);
  --line-2: rgba(243, 241, 231, 0.08);

  --green: #0ad06a;
  --green-deep: #2ee08a;
  --green-ink: #04180f;
  --green-tint: rgba(10, 208, 106, 0.16);

  --glass: rgba(17, 19, 14, 0.8);

  --band: #0a110d;
  --band-ink: #f2f4ec;

  --sh-1: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 20px -14px rgba(0, 0, 0, 0.8);
  --sh-2: 0 2px 4px rgba(0, 0, 0, 0.3), 0 30px 60px -34px rgba(0, 0, 0, 0.9);
  --sh-3: 0 40px 90px -50px #000, 0 8px 20px -12px rgba(0, 0, 0, 0.6);
  color-scheme: dark;
}

/* ---------------------------------------------------------------- base */
* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; overflow-x: clip; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ui);
  font-size: var(--t-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  overflow-x: clip;
}
main, .nav, .foot { position: relative; z-index: 1; }

h1, h2, h3 { font-family: var(--display); font-weight: 900; line-height: 1.12; letter-spacing: -0.015em; text-wrap: balance; }
p { text-wrap: pretty; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--green); color: var(--green-ink); }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(var(--maxw), 100% - 2 * var(--pad)); margin-inline: auto; }
section[id] { scroll-margin-top: 84px; }

/* ---------------------------------------------------------------- 通用排版件 */
.sec-idx {
  display: inline-block;
  font-family: var(--mono);
  font-size: var(--t-xs);
  letter-spacing: 0.14em;
  color: var(--green-deep);
  font-weight: 600;
  line-height: 1;
}
.sec-title { font-size: var(--t-h2); }
.lede {
  font-size: var(--t-lead);
  line-height: 1.66;
  color: var(--ink-2);
  max-width: 23em;               /* CJK：1em≈1 字，23 字一行 */
  margin-top: 16px;
}
.note { font-size: var(--t-sm); color: var(--muted); margin-top: 16px; max-width: 32em; }
kbd {
  display: inline-block; margin: 0 1px; padding: 1px 6px 2px;
  font-family: var(--mono); font-size: 0.78em; line-height: 1.5; color: var(--ink);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  vertical-align: baseline;
}

.sec-head {
  display: flex; align-items: baseline; gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.sec-head .sec-idx { transform: translateY(-2px); }
.sec-rule { flex: 1; height: 1px; background: transparent; }
.sec-head--stack { display: block; border-bottom: 1px solid var(--line); padding-bottom: 22px; }
.sec-head--stack .sec-idx { margin-bottom: 14px; }

/* ---------------------------------------------------------------- 按钮 */
.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 48px; padding: 0 22px; border-radius: var(--r-sm);
  font-size: 15px; font-weight: 600; letter-spacing: 0.01em;
  transition: transform 0.18s var(--ease), background 0.2s, box-shadow 0.25s var(--ease);
}
.btn svg { width: 17px; height: 17px; flex: none; transition: transform 0.28s var(--ease); }
.btn:hover svg { transform: translateX(3px); }
.btn:active { transform: translateY(1px) scale(0.995); }
.btn--primary {
  background: var(--green); color: var(--green-ink);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4), 0 14px 26px -16px rgba(7, 193, 96, 0.95);
}
.btn--primary:hover { background: #06b158; transform: translateY(-1px); box-shadow: inset 0 1px 0 rgba(255,255,255,.45), 0 20px 34px -16px rgba(7, 193, 96, 1); }
.btn--primary::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(102deg, transparent 22%, rgba(255, 255, 255, 0.5) 46%, transparent 70%);
  transform: translateX(-130%);
}
.btn--primary:hover::after { transform: translateX(130%); transition: transform 0.75s var(--ease); }
.btn--lg { height: 54px; padding: 0 26px; font-size: 16px; border-radius: 12px; }
.btn--sm { height: 38px; padding: 0 16px; font-size: 13.5px; }
.btn--paper { background: #fffdf6; color: #15140f; }
.btn--paper:hover { transform: translateY(-2px); box-shadow: 0 18px 30px -20px rgba(4, 40, 24, 0.9); }
.btn--quiet {
  background: transparent; color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line);
  font-weight: 500;
}
.btn--quiet:hover { background: var(--paper-3); box-shadow: inset 0 0 0 1px transparent; transform: none; }

.icon-btn {
  width: 36px; height: 36px; border-radius: 50%;
  display: inline-grid; place-items: center;
  color: var(--muted);
  transition: color 0.2s, background 0.2s;
}
.icon-btn:hover { color: var(--ink); background: var(--paper-3); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

/* ---------------------------------------------------------------- 品牌标记 */
.mark {
  width: 26px; height: 26px; border-radius: 7px; flex: none;
  background: var(--green); color: var(--green-ink);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--display); font-weight: 900; font-size: 14px; line-height: 1;
}
.mark--sm { width: 20px; height: 20px; border-radius: 6px; font-size: 11px; }

/* ---------------------------------------------------------------- 滚动进度 + 顶栏 */
.progress { position: fixed; inset: 0 0 auto; height: 2px; z-index: 60; pointer-events: none; }
.progress i { display: block; height: 100%; width: 0; background: var(--green); }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  backdrop-filter: blur(16px) saturate(1.3);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav-inner { height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; letter-spacing: 0.01em; }
.brand-name { white-space: nowrap; }
.nav-right { display: flex; align-items: center; gap: 8px; }

/* ---------------------------------------------------------------- HERO */
.hero { padding: clamp(32px, 5vh, 64px) 0 clamp(28px, 4.5vh, 56px); position: relative; overflow: hidden; }
.hero::before {
  /* 首屏的极淡绿光：给暖纸一点方向感，不铺满全页 */
  content: "";
  position: absolute; inset: -20% -10% auto -10%; height: 120%;
  pointer-events: none;
  background:
    radial-gradient(760px 460px at 84% 22%, var(--green-tint), transparent 70%),
    radial-gradient(620px 400px at 4% 8%, rgba(21, 20, 15, 0.05), transparent 72%);
}
.hero-grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: clamp(36px, 5vw, 76px);
  align-items: center;
}
.hero-title { font-size: var(--t-h1); line-height: 1.08; letter-spacing: -0.025em; }
.ln { display: block; overflow: hidden; padding-bottom: 0.04em; }
.ln-i { display: block; }
.u {
  background-image: linear-gradient(var(--green), var(--green));
  background-repeat: no-repeat;
  background-position: 0 88%;
  background-size: 100% 0.16em;
}
.hero-sub {
  margin-top: clamp(20px, 2.4vw, 28px);
  font-size: clamp(16px, 0.98rem + 0.28vw, 18.5px);
  line-height: 1.75; color: var(--ink-2); max-width: 26em;
}
.hero-actions { margin-top: clamp(26px, 3vw, 36px); display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero-foot {
  margin-top: clamp(44px, 6.5vh, 84px);
  padding-top: 20px; border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.wordmark { display: inline-flex; align-items: center; gap: 9px; font-size: 13.5px; font-weight: 600; color: var(--ink-2); letter-spacing: 0.01em; }
.hero-links { display: flex; gap: 20px; font-size: 13.5px; }
.hero-links a { color: var(--muted); position: relative; transition: color 0.2s; }
.hero-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.hero-links a:hover { color: var(--ink); }
.hero-links a:hover::after { transform: scaleX(1); }

.hero-stage { position: relative; }
.hero-glow {
  position: absolute; inset: -12% -8% -18% -10%;
  background: radial-gradient(closest-side, var(--green-tint), transparent 78%);
  filter: blur(8px); pointer-events: none;
}
.stack { position: relative; display: flex; flex-direction: column; }
.frame {
  position: relative; border-radius: var(--r); overflow: hidden;
  background: var(--paper-2);
  border: 1px solid var(--line);
  box-shadow: var(--sh-2);
}
.frame img { width: 100%; height: auto; }
.frame--front {
  z-index: 2; width: 100%;
  transform: rotate(-1.2deg) translate3d(calc(var(--mx, 0) * 7px), calc(var(--my, 0) * 6px + var(--sy, 0px)), 0);
  transition: transform 0.6s var(--ease);
}
.frame--back {
  z-index: 3; width: 74%; margin-left: auto; margin-top: -6%;
  transform: rotate(1.7deg) translate3d(calc(var(--mx, 0) * -6px), calc(var(--my, 0) * -5px + var(--sy, 0px) * 1.6), 0);
  transition: transform 0.6s var(--ease);
  box-shadow: 0 30px 60px -34px rgba(21, 20, 15, 0.55), 0 2px 6px rgba(21, 20, 15, 0.06);
}

/* ---------------------------------------------------------------- 01 开始备份 */
.how { padding: var(--sect-y) 0; }
.steps {
  list-style: none;
  margin-top: clamp(36px, 4.5vw, 60px);
  display: grid; gap: clamp(52px, 6.5vw, 92px);
}
.step {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}
.step-body { position: relative; padding-left: clamp(18px, 2.2vw, 28px); }
.step:nth-child(even) .step-visual { order: -1; }
.step:nth-child(even) .step-body { padding-left: clamp(18px, 2.2vw, 28px); }
.step-body::before {
  content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 1px;
  background: var(--line);
}
.step-body::after {
  content: ""; position: absolute; left: -2.5px; top: 0.62em;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 0 5px var(--green-tint);
}
.statement { font-family: var(--display); font-weight: 900; font-size: clamp(25px, 2.5vw, 36px); line-height: 1.24; letter-spacing: -0.02em; }
.support { margin-top: 16px; font-size: clamp(15.5px, 0.96rem + 0.14vw, 16.5px); line-height: 1.8; color: var(--ink-2); max-width: 26em; }

.step-visual {
  position: relative; overflow: hidden;
  padding: clamp(24px, 3.4vw, 46px);
  border-radius: var(--r-lg);
  background: var(--paper-3);
  border: 1px solid var(--line-2);
  display: grid; place-items: center;
  min-height: 240px;
}
.step-visual::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px),
    linear-gradient(0deg, var(--line-2) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(120% 100% at 30% 20%, #000 20%, transparent 78%);
  mask-image: radial-gradient(120% 100% at 30% 20%, #000 20%, transparent 78%);
}

/* 界面碎片（产品即界面，不是画出来的假图） */
.ui-card {
  position: relative; z-index: 1;
  width: min(500px, 100%);
  background: #ffffff; color: #1f2329;
  border-radius: 12px;
  border: 1px solid rgba(20, 30, 24, 0.08);
  box-shadow: var(--sh-2);
  padding: 18px 20px 20px;
}
.ui-head { display: flex; align-items: center; gap: 9px; }
.ui-dots { display: inline-flex; gap: 5px; flex: none; }
.ui-dots i { width: 8px; height: 8px; border-radius: 50%; background: rgba(20, 30, 24, 0.16); }
.ui-title { font-size: 14px; font-weight: 600; color: #1f2329; }
.ui-ok {
  margin-left: auto; width: 18px; height: 18px; border-radius: 50%;
  background: #07c160; color: #fff; display: inline-grid; place-items: center;
}
.ui-ok svg { width: 11px; height: 11px; }
.ui-body { margin-top: 15px; }
.ui-bar { height: 8px; border-radius: 4px; background: #eef0ec; overflow: hidden; }
.ui-bar i { position: relative; display: block; height: 100%; width: 0; border-radius: 4px; background: #07c160; overflow: hidden; transition: width 1.3s var(--ease) 0.15s; }
.ui-bar i::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.65), transparent);
  transform: translateX(-100%);
  animation: barShimmer 2.8s ease-in-out infinite;
}
@keyframes barShimmer {
  0% { transform: translateX(-100%); }
  60%, 100% { transform: translateX(100%); }
}
.ui-card.is-filled .ui-bar i { width: var(--w, 0%); }
.ui-line { margin-top: 9px; font-size: 13px; color: #3f4650; font-variant-numeric: tabular-nums; }
.ui-line--dim { color: #6b7280; }
.ui-tags { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 16px; }
.ui-tags i {
  font-style: normal; font-size: 12.5px; color: #fff; text-align: center;
  background: var(--c, #0f3d2e); border-radius: 9px; padding: 22px 6px;
  transition: transform 0.3s var(--ease);
}
.ui-card:hover .ui-tags i { transform: translateY(-2px); }

/* ---------------------------------------------------------------- 02 文章墙 */
.wall { padding: var(--sect-y) 0; }
.wall-grid {
  display: grid; grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(32px, 5vw, 72px); align-items: center;
}
.wall-copy .sec-idx { margin-bottom: 14px; }
.stat {
  margin-top: clamp(26px, 3.2vw, 38px);
  padding: clamp(26px, 3vw, 38px);
  border-radius: var(--r-lg);
  background: var(--green); color: var(--green-ink);
  position: relative; overflow: hidden;
  box-shadow: 0 24px 48px -30px rgba(7, 193, 96, 0.9);
}
.stat::after {
  content: ""; position: absolute; right: -40px; top: -50px; width: 190px; height: 190px;
  border-radius: 50%; border: 1px solid rgba(4, 40, 24, 0.16);
  box-shadow: 0 0 0 34px rgba(4, 40, 24, 0.05), 0 0 0 68px rgba(4, 40, 24, 0.035);
  pointer-events: none;
}
.stat-n {
  display: flex; align-items: baseline; gap: 8px;
  font-family: var(--display); font-weight: 900;
  font-size: clamp(46px, 6vw, 80px); line-height: 0.98; letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
}
.stat-u { font-size: 0.3em; font-weight: 700; letter-spacing: 0; }
.fp-cap { margin-top: 14px; font-size: 14px; line-height: 1.6; color: rgba(3, 36, 21, 0.82); max-width: 22em; }

.frame--wall { transform: translateZ(0); }

.tick {
  margin-top: clamp(36px, 4.4vw, 58px);
  padding: 15px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}
.tick-track { display: flex; align-items: baseline; gap: 38px; width: max-content; animation: tick 46s linear infinite; }
.tick:hover .tick-track { animation-play-state: paused; }
.tick-track span { font-size: 13.5px; color: var(--ink-2); white-space: nowrap; display: inline-flex; align-items: baseline; gap: 8px; }
.tick-track b { font-family: var(--mono); font-weight: 600; color: var(--ink); font-size: 12.5px; }
.tick-track span::after { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--line); margin-left: 30px; align-self: center; }
@keyframes tick { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------------------------------------------------------------- 03 找爆款 */
.search { padding: var(--sect-y) 0; }
.search-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px); align-items: start;
  margin-top: clamp(32px, 4vw, 48px);
}
.console {
  background: #ffffff; color: #1f2329;
  border-radius: var(--r); overflow: hidden;
  border: 1px solid rgba(20, 30, 24, 0.08);
  box-shadow: var(--sh-2);
}
.console-top { height: 38px; display: flex; align-items: center; padding: 0 15px; background: #fbfcf9; border-bottom: 1px solid #eef0ec; }
.console-body { padding: 16px 16px 10px; }
.db-row { display: flex; gap: 8px; }
.field {
  flex: 1; min-width: 0; height: 40px;
  display: flex; align-items: center; gap: 8px;
  padding: 0 12px; border-radius: 10px;
  background: #fff; border: 1px solid #dde1da;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.field:focus-within { border-color: #07c160; box-shadow: 0 0 0 3px rgba(7, 193, 96, 0.15); }
.field svg { width: 16px; height: 16px; color: #7b838c; flex: none; }
.field input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font: inherit; font-size: 14px; color: #1f2329; }
.field input::placeholder { color: #949ba4; }
.db-btn {
  height: 40px; padding: 0 16px; border-radius: 10px; flex: none;
  background: #f1f3ef; color: #1f2329; font-size: 13.5px;
  transition: background 0.16s, transform 0.12s;
}
.db-btn:hover { background: #e7eae3; }
.db-btn:active { transform: translateY(1px); }
.db-btn.db-primary { background: #07c160; color: #052a1a; font-weight: 600; }
.db-btn.db-primary:hover { background: #06ad56; }
.db-count { margin-top: 14px; min-height: 1.15em; font-size: 12.5px; font-weight: 600; color: #067a3f; letter-spacing: 0.01em; }
.db-list { list-style: none; margin-top: 4px; }
.db-list li {
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 12px; padding: 11px 6px;
  border-top: 1px solid #f1f3ef;
  transition: background 0.15s;
}
.db-list li:hover { background: #f8faf6; }
.db-list .t { grid-column: 1; font-size: 14px; font-weight: 500; color: #1f2329; line-height: 1.45; }
.db-list .acc { grid-column: 1; font-size: 12px; color: #7b838c; }
.db-list .m {
  grid-column: 2; grid-row: 1 / 3; align-self: center;
  font-family: var(--mono); font-size: 11.5px; color: #067a3f; white-space: nowrap;
}
.db-list li.db-empty {
  display: block; grid-template-columns: none;
  text-align: center; padding: 26px 0 18px;
  font-size: 13px; color: #7b838c;
}
.db-list li.db-empty:hover { background: none; }

.frame--search { align-self: start; }
.frame--search img { height: auto; }

.facts {
  list-style: none;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
  margin-top: clamp(36px, 4.4vw, 56px);
  padding-top: clamp(24px, 3vw, 32px);
  border-top: 1px solid var(--line);
}
.facts li { position: relative; padding-left: 28px; font-size: 14.5px; line-height: 1.72; color: var(--ink-2); }
.facts li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 13px; height: 2px; background: var(--green); }
.facts strong { display: block; font-size: 15px; font-weight: 700; color: var(--ink); margin-bottom: 6px; letter-spacing: -0.01em; }
.facts--tight { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 32px; margin-top: 30px; padding-top: 26px; }
.facts--tight li { font-size: 14px; }

/* ---------------------------------------------------------------- 04 点开就读 */
.read { padding: var(--sect-y) 0; }
/* 这张是整窗截图（列表 + 正文），横向细节多 → 图列占主导，文字收窄到读得顺的一列 */
.read-grid {
  display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: clamp(30px, 4.4vw, 64px); align-items: center;
}
.read-copy {
  max-width: 30em; order: 2; align-self: center; display: block;
  border-left: 1px solid var(--line);
  padding-left: clamp(24px, 3vw, 46px);
}
.read-note .note { margin-top: 20px; }
.read-copy .sec-idx { margin-bottom: 14px; }
.frame--reader {
  width: 100%; max-width: 720px; justify-self: start; order: 1;
  box-shadow: 0 40px 80px -48px rgba(21, 20, 15, 0.55), 0 0 0 1px var(--line-2);
}

/* ---------------------------------------------------------------- 05 定时更新（暗带） */
.band {
  --ink: #f2f4ec;
  --ink-2: #cbd2c5;
  --muted: #96a093;
  --line: rgba(255, 255, 255, 0.13);
  --line-2: rgba(255, 255, 255, 0.07);
  --green: #0ad06a;
  --green-deep: #2ee08a;
  background: var(--band);
  color: var(--ink);
  position: relative; overflow: hidden;
  padding: var(--sect-y) 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07), inset 0 -1px 0 rgba(255, 255, 255, 0.07);
}
.band::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.45) 55%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.45) 55%, transparent 100%);
}
.band::after {
  content: ""; position: absolute; pointer-events: none;
  width: 620px; height: 620px; right: -180px; bottom: -320px; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(10, 208, 106, 0.18), transparent 72%);
}

.sched-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: clamp(32px, 5vw, 80px); align-items: center;
}
.sched-copy .sec-idx { margin-bottom: 14px; }

.modal {
  background: #ffffff; color: #1f2329;
  border-radius: var(--r); padding: 22px 24px 20px;
  box-shadow: var(--sh-3);
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.sd-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; font-size: 15px; font-weight: 700; }
.sd-desc { font-size: 12px; font-weight: 400; color: #7b838c; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sd-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 16px; }
.sd-check { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; cursor: pointer; user-select: none; }
.sd-check input { position: absolute; opacity: 0; width: 16px; height: 16px; }
.sd-check i {
  width: 16px; height: 16px; border-radius: 4px; flex: none;
  border: 1px solid #d5dad2; background: #fff;
  display: inline-grid; place-items: center;
  transition: background 0.16s, border-color 0.16s;
}
.sd-check i::after {
  content: ""; width: 8px; height: 4.5px;
  border-left: 2px solid #fff; border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translate(0.5px, -1px) scale(0.4);
  opacity: 0; transition: opacity 0.16s, transform 0.16s;
}
.sd-check input:checked + i { background: #07c160; border-color: #07c160; }
.sd-check input:checked + i::after { opacity: 1; transform: rotate(-45deg) translate(0.5px, -1px) scale(1); }
.sd-choice, .sd-input {
  display: inline-flex; align-items: center; height: 32px; padding: 0 10px;
  background: #fff; border: 1px solid #dde1da; border-radius: var(--r-sm);
  font-size: 13px; color: #1f2329;
  transition: border-color 0.16s;
}
.sd-choice:hover { border-color: #07c160; }
.caret { color: #7b838c; font-size: 10px; margin-left: 4px; }
.sd-ghost { height: 30px; padding: 0 10px; border-radius: var(--r-sm); font-size: 12.5px; color: #4e5561; transition: background 0.16s; }
.sd-ghost:hover { background: #f1f3ef; }
.sd-add {
  margin-top: 14px; height: 32px; padding: 0 14px; border-radius: var(--r-sm);
  background: #067f40; color: #fff; font-size: 13px; font-weight: 500;
  transition: background 0.16s, transform 0.12s;
}
.sd-add:hover { background: #07944b; }
.sd-add:active { transform: translateY(1px); }
.sd-next { margin-top: 18px; padding-top: 14px; border-top: 1px solid #eef0ec; font-size: 13px; color: #4e5561; }
.sd-next span { color: #067a3f; font-weight: 600; }
.sd-btns { display: flex; align-items: center; gap: 8px; margin-top: 16px; }
.sd-saved { font-size: 12.5px; color: #067a3f; animation: pop 0.28s var(--ease); }
.sched-cap { margin-top: 16px; font-size: var(--t-sm); color: var(--muted); max-width: 30em; }

@keyframes pop { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ---------------------------------------------------------------- 06 导出 */
.export { padding: var(--sect-y) 0; }
.export-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px); align-items: center;
  margin-top: clamp(34px, 4.2vw, 54px);
}
.fmt { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.fmt li {
  position: relative; overflow: hidden;
  padding: 18px 18px 20px; border-radius: var(--r);
  background: var(--paper-2); border: 1px solid var(--line);
  transition: transform 0.28s var(--ease), border-color 0.2s, box-shadow 0.28s var(--ease);
}
.fmt li:hover { transform: translateY(-3px); border-color: rgba(7, 193, 96, 0.45); box-shadow: var(--sh-1); }
.fmt-k { display: block; font-size: 15.5px; font-weight: 700; letter-spacing: -0.01em; color: var(--ink); }
.fmt-v { display: block; margin-top: 8px; font-size: 13px; line-height: 1.62; color: var(--muted); }
.fmt li.on { background: var(--green); border-color: transparent; }
.fmt li.on .fmt-k { color: var(--green-ink); }
.fmt li.on .fmt-v { color: rgba(4, 40, 24, 0.8); }
.fmt li.on::after {
  content: ""; position: absolute; right: 14px; top: 14px;
  width: 7px; height: 7px; border-radius: 50%; background: rgba(4, 40, 24, 0.5);
}

.desk {
  border-radius: var(--r-lg); border: 1px solid var(--line-2);
  padding: clamp(22px, 3vw, 42px);
  display: grid; place-items: center;
  background-color: var(--paper-3);
  background-image:
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px),
    linear-gradient(0deg, var(--line-2) 1px, transparent 1px);
  background-size: 52px 52px;
}
.frame--dialog { width: min(520px, 100%); box-shadow: var(--sh-2); transform: rotate(-0.8deg); transition: transform 0.5s var(--ease); }
.desk:hover .frame--dialog { transform: rotate(0deg) scale(1.01); }

/* ---------------------------------------------------------------- 07 AI（暗带） */
.ai { padding-top: calc(var(--sect-y) * 0.9); padding-bottom: calc(var(--sect-y) * 0.9); }
.ai-head {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 14px clamp(24px, 4vw, 72px); align-items: end;
}
.ai-head .sec-idx { grid-column: 1; grid-row: 1; margin-bottom: 4px; }
.ai-head .sec-title { grid-column: 1; grid-row: 2; }
.ai-head .lede { grid-column: 2; grid-row: 1 / 3; margin-top: 0; align-self: end; }
.frame--term {
  position: relative; z-index: 1;
  margin-top: clamp(34px, 4.4vw, 52px);
  width: 100%;
  box-shadow: 0 50px 100px -60px #000, 0 0 0 1px rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.1);
}
.note--band { position: relative; z-index: 1; color: var(--muted); }

/* ---------------------------------------------------------------- 08 FAQ */
.faq { padding: var(--sect-y) 0; }
.faq-grid { display: block; }
.faq-head {
  display: flex; align-items: baseline; gap: 16px;
  padding-bottom: 18px; border-bottom: 1px solid var(--line);
}
.faq-head .sec-idx { transform: translateY(-2px); }
.acc { counter-reset: faq; margin-top: 2px; }
.acc-item { border-bottom: 1px solid var(--line); }
.acc-item:first-child { border-top: 0; }
.q {
  display: grid; grid-template-columns: 46px minmax(0, 1fr) 22px;
  align-items: center; gap: 0 12px;
  width: 100%; padding: 20px 2px; text-align: left;
  font-size: clamp(16px, 1rem + 0.22vw, 17.5px); font-weight: 600; color: var(--ink);
  transition: color 0.2s;
}
.q::before {
  counter-increment: faq;
  content: counter(faq, decimal-leading-zero);
  font-family: var(--mono); font-size: 11.5px; font-weight: 500; letter-spacing: 0.08em;
  color: var(--muted); transition: color 0.2s;
}
.q:hover { color: var(--green-deep); }
.q:hover::before { color: var(--green-deep); }
.q-i { position: relative; width: 16px; height: 16px; justify-self: end; }
.q-i::before, .q-i::after { content: ""; position: absolute; background: var(--muted); transition: transform 0.34s var(--ease), background 0.24s; }
.q-i::before { left: 0; top: 7px; width: 16px; height: 1.5px; }
.q-i::after { left: 7px; top: 0; width: 1.5px; height: 16px; }
.acc-item.on .q-i::after { transform: scaleY(0); }
.acc-item.on .q-i::before { background: var(--green); }
.ans-wrap {
  overflow: hidden; max-height: 0;
  transition: max-height 0.42s var(--ease);
}
.acc-item.on .ans-wrap { max-height: 420px; }
.ans { font-size: 15.5px; line-height: 1.8; color: var(--ink-2); max-width: 30em; padding: 0 0 22px 58px; }

/* ---------------------------------------------------------------- CTA */
.cta {
  position: relative; overflow: hidden;
  background: var(--green); color: var(--green-ink);
  padding: clamp(88px, 12vw, 156px) 0;
}
.cta::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(700px 380px at 88% 0%, rgba(255, 255, 255, 0.35), transparent 70%),
    repeating-linear-gradient(118deg, rgba(4, 40, 24, 0.06) 0 1px, transparent 1px 22px);
  -webkit-mask-image: linear-gradient(160deg, #000 10%, transparent 62%);
  mask-image: linear-gradient(160deg, #000 10%, transparent 62%);
}
.cta-grid {
  position: relative;
  display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: clamp(32px, 5vw, 72px); align-items: end;
}
.cta-line { font-size: clamp(42px, 7.2vw, 100px); line-height: 1.02; letter-spacing: -0.035em; }
.cta-sub { font-size: clamp(16px, 1rem + 0.25vw, 18.5px); line-height: 1.72; color: rgba(4, 40, 24, 0.86); max-width: 24em; }
.cta-side .btn { margin-top: 28px; }
.cta-fine { margin-top: 24px; font-size: 13.5px; line-height: 1.7; color: rgba(3, 36, 21, 0.78); max-width: 30em; }

/* ---------------------------------------------------------------- 页脚 */
.foot { padding: clamp(48px, 6vw, 76px) 0 clamp(36px, 4vw, 56px); border-top: 1px solid var(--line); }
.foot-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.f-what { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 600; }
.f-year { font-family: var(--mono); font-size: 12.5px; color: var(--muted); }
.f-links { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 20px; font-size: 13.5px; }
.f-links a { color: var(--muted); transition: color 0.18s; }
.f-links a:hover { color: var(--ink); }

/* ---------------------------------------------------------------- 入场动效 */
html.js .ln-i { transform: translateY(112%); }
.hero.is-ready .ln-i { transform: none; transition: transform 1s var(--ease) var(--ld, 0ms); }
html.js .u { background-size: 0% 0.16em; }
html.js .hero.is-ready .u { background-size: 100% 0.16em; transition: background-size 0.85s var(--ease) 0.6s; }

html.js [data-reveal] { opacity: 0; transform: translateY(24px); }
html.js [data-reveal].is-in {
  opacity: 1; transform: none;
  transition: opacity 0.75s var(--ease) var(--d, 0ms), transform 0.85s var(--ease) var(--d, 0ms);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .ln-i, html.js [data-reveal] { transform: none; opacity: 1; }
  html.js .ln-i { transform: none; }
  html.js [data-reveal] { opacity: 1; }
  .tick-track { animation: none; }
  .ui-bar i::after { animation: none; opacity: 0; }
  .btn--primary::after { display: none; }
  .frame--front, .frame--back, .frame--dialog { transition: none; }
}

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; gap: clamp(40px, 7vw, 64px); }
  .hero-sub { max-width: 26em; }
  .hero-foot { margin-top: 40px; }
  .step { grid-template-columns: 1fr; gap: 22px; }
  .step:nth-child(even) .step-visual { order: 0; }
  .step-body { padding-left: 20px; }
  .wall-grid, .search-grid, .read-grid, .sched-grid, .export-grid, .cta-grid { grid-template-columns: 1fr; }
  .read-copy { max-width: none; order: 0; border-left: 0; padding-left: 0; align-self: auto; display: block; }
  .read-note .note { margin-top: 16px; padding-top: 0; }
  .frame--reader { max-width: 640px; justify-self: start; order: 0; }
  .facts { grid-template-columns: 1fr; gap: 20px; }
  .facts--tight { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ai-head { display: block; }
  .ai-head .lede { margin-top: 16px; }
  .cta-grid { align-items: start; }
  .cta-line { font-size: clamp(40px, 12vw, 76px); }
}

@media (max-width: 720px) {
  :root { --sect-y: clamp(56px, 9vw, 84px); }
  .nav-inner { height: 58px; }
  .brand-name { font-size: 13px; }
  .hero { padding-top: 22px; }
  .hero-title { letter-spacing: -0.02em; }
  .hero-actions .btn { width: 100%; }
  .hero-foot { flex-direction: column; align-items: flex-start; gap: 16px; }
  .frame--front { width: 100%; transform: rotate(-1deg); }
  .frame--back { display: none; }
  .stack { padding-bottom: 0; }
  .facts--tight { grid-template-columns: 1fr; }
  .fmt { grid-template-columns: 1fr; }
  .db-row { flex-wrap: wrap; }
  .field { flex-basis: 100%; }
  .db-btn { flex: 1; }
  .db-list .m { font-size: 11px; }
  .stat-n { font-size: clamp(42px, 13vw, 64px); }
  .modal { padding: 18px 16px 16px; }
  .sd-title { flex-direction: column; gap: 4px; align-items: flex-start; }
  .sd-btns { flex-wrap: wrap; }
  .cta-fine { text-align: left; }
  .foot-row { align-items: flex-start; }
}

@media (max-width: 480px) {
  .brand-name { display: none; }
  .step-visual { padding: 18px; min-height: 0; }
  .ui-card { padding: 14px 14px 16px; }
  .ui-tags i { padding: 16px 4px; }
  .desk { padding: 18px; }
  .q { grid-template-columns: 34px minmax(0, 1fr) 20px; padding: 17px 2px; }
  .ans { padding-left: 46px; }
}