/* ============================================================
   ScanKing 智享扫描王 — 官网样式
   设计令牌 / 导航 / Hero(手机样机+动效) / 功能 / 场景 / 流程 /
   隐私 / 下载 / 页脚 / 法律页(隐私政策 · 用户协议)
   ============================================================ */

:root {
  --bg: #06080b;
  --bg-soft: #0a0e13;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --surface-2: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f2f5f7;
  --text-muted: #9aa4ae;
  --text-dim: #5f6873;
  --brand: #0fcb9b;
  --brand-deep: #0aa882;
  --brand-2: #22d3ee;
  --brand-grad: linear-gradient(135deg, #0fcb9b 0%, #22d3ee 100%);
  --brand-soft: rgba(15, 203, 155, 0.12);
  --brand-softer: rgba(15, 203, 155, 0.07);
  --gold: #f6c453;
  --ink: #04231d;
  --green: #28c840;
  --green-soft: #6ee088;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
  --maxw: 1120px;
  --maxw-doc: 860px;
  --radius: 16px;
  --radius-lg: 24px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

::selection {
  background: rgba(15, 203, 155, 0.32);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(15, 203, 155, 0.4);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* 全局环境光(与法律页一致) */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60% 45% at 50% -8%, rgba(15, 203, 155, 0.13) 0%, transparent 62%),
    radial-gradient(38% 36% at 100% 18%, rgba(34, 211, 238, 0.08) 0%, transparent 60%),
    radial-gradient(36% 34% at 0% 55%, rgba(15, 203, 155, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

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

.icon {
  width: 24px;
  height: 24px;
  flex: none;
}

/* ========== 语言切换:未激活语言默认隐藏 ========== */
html[data-lang='zh'] .en {
  display: none;
}
html[data-lang='en'] .zh {
  display: none;
}

/* ========== 顶部导航 ========== */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(6, 8, 11, 0.72);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}
.nav--scrolled {
  border-bottom-color: var(--border);
  background: rgba(6, 8, 11, 0.85);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: 68px;
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 650;
  font-size: 15.5px;
  letter-spacing: -0.01em;
}
.nav__logo {
  border-radius: 8px;
  transition: transform 0.4s var(--ease-spring);
}
.nav__brand:hover .nav__logo {
  transform: rotate(-6deg) scale(1.06);
}
.nav__name {
  transition: color 0.25s var(--ease-out);
  color: var(--text);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav__links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 13px;
  border-radius: 100px;
  transition: color 0.25s var(--ease-out), background 0.25s var(--ease-out);
}
.nav__links a:hover {
  color: var(--text);
  background: var(--surface-hover);
}
.nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav__lang {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all 0.25s var(--ease-out);
}
.nav__lang:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-hover);
}
.nav__lang svg {
  width: 15px;
  height: 15px;
}
.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all 0.25s var(--ease-out);
}
.nav__link:hover {
  color: var(--text);
  background: var(--surface-hover);
  border-color: var(--border-strong);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  border-radius: 100px;
  padding: 13px 26px;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease-out),
    background 0.25s var(--ease-out), border-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
  white-space: nowrap;
}
.btn--primary {
  background: var(--brand-grad);
  color: var(--ink);
  box-shadow: 0 8px 28px -8px rgba(15, 203, 155, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px -8px rgba(15, 203, 155, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.btn--primary:active {
  transform: translateY(0);
}
.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.btn--sm {
  padding: 9px 18px;
  font-size: 13.5px;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  padding: 92px 0 40px;
  overflow: hidden;
}
/* 点阵网格,向四周淡出 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: radial-gradient(58% 52% at 50% 34%, #000 0%, transparent 100%);
  mask-image: radial-gradient(58% 52% at 50% 34%, #000 0%, transparent 100%);
  pointer-events: none;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(74px);
  pointer-events: none;
  will-change: transform;
}
.orb--1 {
  width: 520px;
  height: 520px;
  top: -14%;
  left: -10%;
  background: radial-gradient(circle, rgba(15, 203, 155, 0.22) 0%, transparent 68%);
  animation: orbDrift 16s ease-in-out infinite alternate;
}
.orb--2 {
  width: 460px;
  height: 460px;
  bottom: -24%;
  right: -12%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.16) 0%, transparent 68%);
  animation: orbDrift 19s ease-in-out infinite alternate-reverse;
}
.orb--3 {
  width: 300px;
  height: 300px;
  top: 34%;
  right: 30%;
  background: radial-gradient(circle, rgba(246, 196, 83, 0.07) 0%, transparent 70%);
  animation: orbDrift 23s ease-in-out infinite alternate;
}
@keyframes orbDrift {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(46px, 34px) scale(1.12);
  }
}

.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface);
  backdrop-filter: blur(8px);
}
.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-grad);
  box-shadow: 0 0 12px var(--brand);
  animation: dotPulse 2.4s ease-in-out infinite;
}
@keyframes dotPulse {
  0%,
  100% {
    box-shadow: 0 0 4px var(--brand);
    opacity: 0.75;
  }
  50% {
    box-shadow: 0 0 14px var(--brand);
    opacity: 1;
  }
}

.hero h1 {
  margin: 26px 0 20px;
  font-size: clamp(38px, 5.4vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 750;
}
.hero h1 .accent {
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero__sub {
  font-size: clamp(15px, 1.6vw, 17.5px);
  color: var(--text-muted);
  max-width: 34em;
  line-height: 1.75;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.hero__platforms {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-top: 30px;
  font-size: 13px;
  color: var(--text-dim);
}
.hero__platforms .chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--surface);
  color: var(--text-muted);
  font-weight: 550;
  font-size: 12.5px;
}
.hero__platforms .chip svg {
  width: 13px;
  height: 13px;
  color: var(--brand);
}

/* ---------- 手机样机 ---------- */
.phone-stage {
  position: relative;
  display: flex;
  justify-content: center;
  perspective: 1200px;
}
.phone-glow {
  position: absolute;
  width: 130%;
  height: 62%;
  top: 19%;
  left: -15%;
  background: radial-gradient(ellipse at center, rgba(15, 203, 155, 0.22) 0%, transparent 65%);
  filter: blur(34px);
  pointer-events: none;
}
.phone {
  position: relative;
  width: 292px;
  aspect-ratio: 9 / 18.6;
  border-radius: 46px;
  background: linear-gradient(165deg, #232b33 0%, #10151b 55%, #0a0e12 100%);
  padding: 11px;
  box-shadow: 0 50px 90px -28px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(255, 255, 255, 0.09),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  transform: rotateY(-7deg) rotateX(2deg);
  transition: transform 0.8s var(--ease-out);
}
.phone-stage:hover .phone {
  transform: rotateY(-2deg) rotateX(0deg);
}
.phone::after {
  /* 侧边高光 */
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.14) 0%, transparent 22%);
  pointer-events: none;
}
.phone__notch {
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 34%;
  height: 21px;
  background: #05070a;
  border-radius: 100px;
  z-index: 3;
}
.phone__screen {
  position: relative;
  height: 100%;
  border-radius: 36px;
  background: #080b0f;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 16px 12px 14px;
}
.ph-statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 8px;
  margin-bottom: 12px;
  font-size: 10.5px;
  font-weight: 650;
  color: #d5dce2;
}
.ph-statusbar__right {
  display: flex;
  align-items: center;
  gap: 5px;
}
.ph-bars {
  display: flex;
  align-items: flex-end;
  gap: 1.5px;
  height: 9px;
}
.ph-bars i {
  width: 2.5px;
  background: #d5dce2;
  border-radius: 1px;
}
.ph-bars i:nth-child(1) { height: 3px; }
.ph-bars i:nth-child(2) { height: 5px; }
.ph-bars i:nth-child(3) { height: 7px; }
.ph-bars i:nth-child(4) { height: 9px; }
.ph-batt {
  width: 16px;
  height: 8px;
  border: 1px solid #d5dce2;
  border-radius: 2.5px;
  position: relative;
  padding: 1px;
}
.ph-batt::after {
  content: '';
  position: absolute;
  right: -3px;
  top: 2.5px;
  width: 1.5px;
  height: 3px;
  background: #d5dce2;
  border-radius: 0 1px 1px 0;
}
.ph-batt i {
  display: block;
  height: 100%;
  width: 72%;
  background: var(--brand);
  border-radius: 1px;
}

/* 取景器 */
.ph-viewfinder {
  position: relative;
  flex: 1;
  border-radius: 20px;
  background: radial-gradient(120% 100% at 50% 0%, #10151c 0%, #05070a 100%);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.ph-paper {
  position: relative;
  width: 68%;
  aspect-ratio: 3 / 4;
  background: linear-gradient(180deg, #ffffff 0%, #e9eef2 100%);
  border-radius: 5px;
  transform: rotate(-1.6deg);
  box-shadow: 0 18px 34px -12px rgba(0, 0, 0, 0.7);
  padding: 11% 11%;
  animation: paperBreathe 7s ease-in-out infinite;
}
@keyframes paperBreathe {
  0%, 100% { transform: rotate(-1.6deg); }
  50% { transform: rotate(-1.1deg) translateY(-2px); }
}
.ph-fill {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(15, 203, 155, 0.1); /* 与 App 取景框内填充同浓度 */
  pointer-events: none;
}
.ph-paper__title {
  width: 52%;
  height: 6px;
  border-radius: 3px;
  background: #33404d;
  margin-bottom: 8px;
}
.ph-paper__line {
  height: 3.5px;
  border-radius: 2px;
  background: #b9c3cc;
  margin-bottom: 6px;
}
.ph-paper__line:nth-child(3) { width: 92%; }
.ph-paper__line:nth-child(4) { width: 78%; }
.ph-paper__line:nth-child(5) { width: 86%; }
.ph-paper__line:nth-child(6) { width: 64%; }
.ph-paper__line:nth-child(7) { width: 88%; }
.ph-paper__line:nth-child(8) { width: 40%; }
.ph-corner {
  position: absolute;
  width: 15px;
  height: 15px;
  border: 2.5px solid var(--brand);
  animation: cornerPulse 2.8s ease-in-out infinite;
}
.ph-corner.tl { top: -7px; left: -7px; border-right: none; border-bottom: none; border-radius: 4px 0 0 0; }
.ph-corner.tr { top: -7px; right: -7px; border-left: none; border-bottom: none; border-radius: 0 4px 0 0; }
.ph-corner.br { bottom: -7px; right: -7px; border-left: none; border-top: none; border-radius: 0 0 4px 0; animation-delay: 0.7s; }
.ph-corner.bl { bottom: -7px; left: -7px; border-right: none; border-top: none; border-radius: 0 0 0 4px; animation-delay: 0.7s; }
@keyframes cornerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}
.ph-scanline {
  position: absolute;
  left: 5%;
  right: 5%;
  top: 9%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--brand) 30%, var(--brand-2) 70%, transparent);
  box-shadow: 0 0 16px 3px rgba(15, 203, 155, 0.55);
  animation: scanSweep 3.4s ease-in-out infinite alternate;
}
@keyframes scanSweep {
  from { top: 9%; }
  to { top: 84%; }
}
.ph-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9.5px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(6, 8, 11, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 3.5px 11px;
  border-radius: 100px;
  backdrop-filter: blur(6px);
  white-space: nowrap;
}

/* 模式条 */
.ph-modes {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin: 12px auto 0;
  padding: 3px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 100px;
}
.ph-modes span {
  font-size: 10px;
  font-weight: 650;
  padding: 4px 14px;
  border-radius: 100px;
  color: var(--text-dim);
}
.ph-modes span.on {
  background: var(--brand-grad);
  color: var(--ink);
}

/* 底栏:缩略图 / 快门 / 完成 */
.ph-shutter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 10px 2px;
}
.ph-thumb {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  background: linear-gradient(160deg, #1b232c, #0d1218);
  display: grid;
  place-items: center;
}
.ph-thumb i {
  width: 13px;
  height: 16px;
  border-radius: 2px;
  background: linear-gradient(180deg, #fff, #c9d2da);
}
.ph-shutter {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid var(--brand);
  display: grid;
  place-items: center;
  box-shadow: 0 0 18px -2px rgba(15, 203, 155, 0.5);
}
.ph-shutter i {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand-grad);
  transition: transform 0.25s var(--ease-spring);
}
.phone-stage:hover .ph-shutter i {
  transform: scale(0.88);
}
.ph-done {
  font-size: 10px;
  font-weight: 700;
  color: var(--ink);
  background: var(--brand-grad);
  padding: 7px 12px;
  border-radius: 100px;
}

/* ---------- 悬浮卡片 ---------- */
.fcard {
  position: absolute;
  background: rgba(13, 17, 23, 0.86);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  padding: 13px 15px;
  box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  animation: floatY 6.5s ease-in-out infinite;
  z-index: 4;
}
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-11px); }
}
.fcard--ocr {
  top: 7%;
  left: -84px;
  width: 196px;
  animation-delay: 0.8s;
}
.fcard__head {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 10px;
}
.fcard__head .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 8px var(--brand);
}
.fcard__badge {
  margin-left: auto;
  font-size: 9.5px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid rgba(15, 203, 155, 0.3);
  padding: 2px 7px;
  border-radius: 100px;
  font-family: var(--font-mono);
}
.ocr-lines {
  position: relative;
  display: grid;
  gap: 7px;
}
.ocr-lines i {
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.14);
}
.ocr-lines i:nth-child(1) { width: 88%; }
.ocr-lines i:nth-child(2) { width: 96%; }
.ocr-lines i:nth-child(3) { width: 74%; }
.ocr-lines i:nth-child(4) { width: 90%; }
.ocr-hl {
  position: absolute;
  left: -5px;
  right: -5px;
  height: 8px;
  border-radius: 4px;
  background: rgba(15, 203, 155, 0.22);
  box-shadow: inset 0 0 0 1px rgba(15, 203, 155, 0.35);
  animation: hlStep 5.1s steps(1) infinite;
}
@keyframes hlStep {
  0% { top: 0; }
  33% { top: 13px; }
  66% { top: 26px; }
  100% { top: 0; }
}
.fcard--crop {
  top: 41%;
  right: -70px;
  width: 158px;
  animation-delay: 2.2s;
}
.crop-demo {
  display: flex;
  align-items: center;
  gap: 8px;
}
.crop-demo__before,
.crop-demo__after {
  width: 42px;
  height: 52px;
  border-radius: 4px;
  position: relative;
}
.crop-demo__before {
  background: rgba(255, 255, 255, 0.1);
  border: 1px dashed rgba(255, 255, 255, 0.3);
  transform: skewY(-7deg) rotate(-3deg);
}
.crop-demo__after {
  background: linear-gradient(180deg, #fff, #dfe6ec);
  box-shadow: 0 4px 14px -4px rgba(0, 0, 0, 0.6);
}
.crop-demo__after::before,
.crop-demo__after::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  border: 2px solid var(--brand);
}
.crop-demo__after::before {
  top: -4px;
  left: -4px;
  border-right: none;
  border-bottom: none;
}
.crop-demo__after::after {
  bottom: -4px;
  right: -4px;
  border-left: none;
  border-top: none;
}
.crop-demo__arrow {
  color: var(--brand);
  display: grid;
  place-items: center;
}
.crop-demo__arrow svg {
  width: 15px;
  height: 15px;
}
.fcard__foot {
  margin-top: 9px;
  font-size: 10px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}
.fcard__foot b {
  color: var(--brand);
  font-weight: 650;
}
.fcard--filter {
  bottom: 6%;
  left: -64px;
  width: 172px;
  animation-delay: 4s;
}
.filter-row {
  display: flex;
  gap: 6px;
  position: relative;
  overflow: hidden;
  border-radius: 8px;
}
.filter-row span {
  flex: 1;
  height: 30px;
  border-radius: 6px;
  border: 1.5px solid transparent;
}
.filter-row span:nth-child(1) { background: linear-gradient(150deg, #3a434e, #222a33); }
.filter-row span:nth-child(2) { background: linear-gradient(150deg, #8f9aa6, #5d6772); }
.filter-row span:nth-child(3) { background: linear-gradient(150deg, #ffffff, #cdd6de); border-color: var(--brand); box-shadow: 0 0 10px -2px rgba(15, 203, 155, 0.7); }
.filter-row span:nth-child(4) { background: linear-gradient(150deg, #10161d, #05070a); }
.filter-row::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 34px;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.22), transparent);
  transform: translateX(-40px);
  animation: sheen 3.6s ease-in-out infinite;
}
@keyframes sheen {
  0%, 55% { transform: translateX(-40px); }
  100% { transform: translateX(180px); }
}

/* ========== 数据统计条 ========== */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.015);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 44px 0;
}
.stat {
  text-align: center;
}
.stat__num {
  font-size: clamp(34px, 4vw, 46px);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-variant-numeric: tabular-nums;
}
.stat__label {
  margin-top: 6px;
  font-size: 13.5px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ========== 通用 Section 头 ========== */
.section {
  padding: 108px 0;
  position: relative;
}
.section--tight {
  padding: 84px 0;
}
.section__head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}
.section__head h2 {
  margin: 18px 0 16px;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 720;
}
.section__head p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
}
.section__head .accent {
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ========== 功能卡片 ========== */
.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.feature {
  position: relative;
  padding: 28px 26px;
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, var(--surface-2), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.45s var(--ease-out), border-color 0.35s var(--ease-out),
    box-shadow 0.45s var(--ease-out);
}
.feature::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 180px at var(--mx, 50%) var(--my, 0%), rgba(15, 203, 155, 0.1), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
}
.feature:hover {
  transform: translateY(-5px);
  border-color: rgba(15, 203, 155, 0.35);
  box-shadow: 0 24px 44px -20px rgba(0, 0, 0, 0.7), 0 0 32px -18px rgba(15, 203, 155, 0.5);
}
.feature:hover::before {
  opacity: 1;
}
.feature__icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--brand-soft);
  border: 1px solid rgba(15, 203, 155, 0.22);
  display: grid;
  place-items: center;
  color: var(--brand);
  margin-bottom: 18px;
  transition: transform 0.5s var(--ease-spring);
}
.feature:hover .feature__icon {
  transform: scale(1.1) rotate(-4deg);
}
.feature__icon svg {
  width: 22px;
  height: 22px;
}
.feature h3 {
  font-size: 16.5px;
  font-weight: 650;
  letter-spacing: -0.012em;
  margin-bottom: 9px;
}
.feature p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== 场景化 ========== */
.scn-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 40px;
}
.scn-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s var(--ease-out);
}
.scn-tab svg {
  width: 16px;
  height: 16px;
}
.scn-tab:hover {
  color: var(--text);
  border-color: var(--border-strong);
}
.scn-tab.active {
  background: var(--brand-soft);
  border-color: rgba(15, 203, 155, 0.45);
  color: var(--brand);
  box-shadow: 0 0 24px -8px rgba(15, 203, 155, 0.45);
}
.scn-panels {
  position: relative;
}
.scn-panel {
  display: none;
}
.scn-panel.active {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 22px;
  animation: panelIn 0.5s var(--ease-out);
}
@keyframes panelIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
}
.scn-card {
  padding: 36px 34px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(15, 203, 155, 0.1) 0%, rgba(255, 255, 255, 0.015) 55%);
  border: 1px solid rgba(15, 203, 155, 0.22);
  display: flex;
  flex-direction: column;
}
.scn-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 15px;
  background: var(--brand-grad);
  display: grid;
  place-items: center;
  color: var(--ink);
  margin-bottom: 20px;
  box-shadow: 0 12px 30px -10px rgba(15, 203, 155, 0.6);
}
.scn-card__icon svg {
  width: 25px;
  height: 25px;
}
.scn-card h3 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.scn-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.75;
  flex: 1;
}
.scn-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
.scn-card__tags span {
  font-size: 12px;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-softer);
  border: 1px solid rgba(15, 203, 155, 0.25);
  border-radius: 100px;
  padding: 4px 12px;
}
.scn-spec {
  padding: 36px 34px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}
.scn-spec h4 {
  font-size: 13px;
  font-weight: 650;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.scn-spec__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.scn-spec__row:last-child {
  border-bottom: none;
}
.scn-spec__row .k {
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}
.scn-spec__row .v {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-softer);
  border: 1px solid rgba(15, 203, 155, 0.2);
  padding: 3px 11px;
  border-radius: 8px;
  text-align: right;
}

/* ========== 流程 ========== */
.flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.flow::before {
  content: '';
  position: absolute;
  top: 33px;
  left: 6%;
  right: 6%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(15, 203, 155, 0.55), rgba(34, 211, 238, 0.55), transparent);
  opacity: 0.5;
}
.flow__dot {
  position: absolute;
  top: 28px;
  left: 6%;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 16px 4px rgba(15, 203, 155, 0.55);
  animation: flowDot 5.5s linear infinite;
}
@keyframes flowDot {
  from { left: 6%; }
  to { left: calc(94% - 11px); }
}
.flow__step {
  position: relative;
  text-align: center;
  padding: 0 6px;
}
.flow__icon {
  width: 62px;
  height: 62px;
  margin: 0 auto 16px;
  border-radius: 20px;
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  color: var(--brand);
  position: relative;
  z-index: 2;
  transition: transform 0.45s var(--ease-spring), border-color 0.3s var(--ease-out),
    box-shadow 0.4s var(--ease-out);
}
.flow__step:hover .flow__icon {
  transform: translateY(-5px) scale(1.06);
  border-color: rgba(15, 203, 155, 0.5);
  box-shadow: 0 16px 30px -12px rgba(15, 203, 155, 0.45);
}
.flow__icon svg {
  width: 25px;
  height: 25px;
}
.flow__num {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 21px;
  height: 21px;
  border-radius: 50%;
  background: var(--brand-grad);
  color: var(--ink);
  font-size: 11px;
  font-weight: 750;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
}
.flow__step h3 {
  font-size: 15px;
  font-weight: 650;
  margin-bottom: 6px;
}
.flow__step p {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========== 隐私 ========== */
.privacy__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.privacy__item {
  padding: 30px 26px;
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, rgba(40, 200, 64, 0.05), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--border);
  transition: transform 0.4s var(--ease-out), border-color 0.3s var(--ease-out);
}
.privacy__item:hover {
  transform: translateY(-4px);
  border-color: rgba(40, 200, 64, 0.3);
}
.privacy__item .feature__icon {
  background: rgba(40, 200, 64, 0.1);
  border-color: rgba(40, 200, 64, 0.25);
  color: var(--green-soft);
}
.privacy__item h3 {
  font-size: 15.5px;
  font-weight: 650;
  margin-bottom: 8px;
}
.privacy__item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}
.privacy__more {
  text-align: center;
  margin-top: 40px;
}

/* ========== 下载 ========== */
.download__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.dl-card {
  position: relative;
  padding: 36px 30px;
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, var(--surface-2), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--border);
  text-align: center;
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), border-color 0.3s var(--ease-out);
}
.dl-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-strong);
}
.dl-card__icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 18px;
  border-radius: 17px;
  background: var(--brand-soft);
  border: 1px solid rgba(15, 203, 155, 0.25);
  display: grid;
  place-items: center;
  color: var(--brand);
}
.dl-card__icon svg {
  width: 28px;
  height: 28px;
}
.dl-card h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 6px;
}
.dl-card__soon {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 650;
  color: var(--gold);
  background: rgba(246, 196, 83, 0.1);
  border: 1px solid rgba(246, 196, 83, 0.3);
  border-radius: 100px;
  padding: 3px 12px;
  margin-bottom: 14px;
}
.dl-card p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
}
.download__note {
  text-align: center;
  margin-top: 28px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ========== 页脚 ========== */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.012);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 44px 0 40px;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 650;
  font-size: 14.5px;
}
.footer__brand small {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  margin-top: 2px;
}
.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-size: 13.5px;
  color: var(--text-muted);
}
.footer__links a {
  transition: color 0.25s var(--ease-out);
}
.footer__links a:hover {
  color: var(--brand);
}
.footer__copy {
  padding: 0 0 36px;
  text-align: center;
  font-size: 12.5px;
  color: var(--text-dim);
}

/* ========== 法律页(隐私政策 / 用户协议) ========== */
.legal-hero {
  padding: 92px 0 40px;
  text-align: center;
}
.legal-hero h1 {
  margin: 22px 0 14px;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 730;
}
.legal-hero .meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-dim);
}
.legal-hero .meta time {
  color: var(--text-muted);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  padding: 9px 18px;
  border-radius: 100px;
  background: rgba(40, 200, 64, 0.09);
  border: 1px solid rgba(40, 200, 64, 0.3);
  font-size: 13px;
  font-weight: 600;
  color: var(--green-soft);
}
.badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
}
.summary {
  margin-bottom: 44px;
  padding: 34px 36px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(15, 203, 155, 0.1) 0%, rgba(255, 255, 255, 0.015) 55%);
  border: 1px solid var(--border-strong);
}
.summary h2 {
  font-size: 17px;
  font-weight: 650;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 11px;
}
.summary h2::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-grad);
}
.summary__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.summary__item {
  padding: 20px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
}
.summary__item .check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(40, 200, 64, 0.14);
  color: var(--green-soft);
  font-size: 13px;
  font-weight: 750;
  margin-bottom: 12px;
}
.summary__item strong {
  display: block;
  font-size: 14.5px;
  font-weight: 650;
  margin-bottom: 5px;
}
.summary__item span:not(.check) {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
}
.doc {
  padding: 8px 0 90px;
}
.doc-card {
  margin-bottom: 22px;
  padding: 40px 44px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: border-color 0.3s var(--ease-out);
}
.doc-card:hover {
  border-color: var(--border-strong);
}
.doc-card h2 {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.015em;
  margin-bottom: 16px;
}
.doc-card h2 .num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 650;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.doc-card p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.doc-card p:last-child {
  margin-bottom: 0;
}
.doc-card p strong {
  color: var(--text);
  font-weight: 650;
}
.doc-card ul {
  margin: 4px 0 14px;
  padding-left: 2px;
  list-style: none;
}
.doc-card li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--text-muted);
}
.doc-card li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-grad);
  opacity: 0.85;
}
.doc-card li strong {
  color: var(--text);
  font-weight: 650;
}
.doc-card a {
  color: var(--brand-2);
  font-weight: 550;
  border-bottom: 1px solid rgba(34, 211, 238, 0.35);
  transition: border-color 0.25s var(--ease-out);
}
.doc-card a:hover {
  border-color: var(--brand-2);
}

/* ========== 滚动显现 ========== */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ========== 响应式 ========== */
@media (max-width: 1080px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .privacy__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .fcard--ocr {
    left: -40px;
  }
  .fcard--crop {
    right: -30px;
  }
  .fcard--filter {
    left: -30px;
  }
}
@media (max-width: 960px) {
  .nav__links {
    display: none;
  }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 70px;
  }
  .hero {
    padding-top: 64px;
  }
  .hero__sub {
    max-width: none;
  }
  .scn-panel.active {
    grid-template-columns: 1fr;
  }
  .flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 34px 16px;
  }
  .flow::before,
  .flow__dot {
    display: none;
  }
}
@media (max-width: 720px) {
  .container {
    padding: 0 22px;
  }
  .section {
    padding: 76px 0;
  }
  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 16px;
  }
  .features__grid {
    grid-template-columns: 1fr;
  }
  .privacy__grid {
    grid-template-columns: 1fr;
  }
  .download__grid {
    grid-template-columns: 1fr;
  }
  .flow {
    grid-template-columns: repeat(2, 1fr);
  }
  .phone {
    width: 252px;
    transform: none;
  }
  .phone-stage:hover .phone {
    transform: none;
  }
  .fcard--crop,
  .fcard--filter {
    display: none;
  }
  .fcard--ocr {
    left: -8px;
    top: 4%;
  }
  .summary {
    padding: 24px;
  }
  .summary__grid {
    grid-template-columns: 1fr;
  }
  .doc-card {
    padding: 30px 24px;
  }
  .doc-card h2 {
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }
  .legal-hero {
    padding: 64px 0 32px;
  }
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 480px) {
  .hero__cta .btn {
    width: 100%;
  }
}

/* ========== 动效减弱 ========== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   迭代 v2:可访问性 / 移动端菜单 / 滚动高亮 / 回到顶部 /
   宽屏适配样机 / FAQ / 404 / 打印样式
   ============================================================ */

/* ---------- 可访问性 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--brand-grad);
  color: var(--ink);
  font-weight: 650;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 0 0 12px 0;
}
.skip-link:focus {
  left: 0;
}
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 8px;
}
/* 锚点跳转不被吸顶导航遮挡 */
section[id] {
  scroll-margin-top: 84px;
}

/* ---------- 导航:移动端菜单 + 滚动高亮 ---------- */
.nav__links a.active,
.nav__menu a.active {
  color: var(--brand);
  background: var(--brand-soft);
}
.nav__burger {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  place-items: center;
  transition: all 0.25s var(--ease-out);
}
.nav__burger:hover {
  color: var(--text);
  border-color: var(--border-strong);
}
.nav__burger svg {
  width: 19px;
  height: 19px;
}
.nav__burger .icon-close {
  display: none;
}
.nav__burger[aria-expanded='true'] .icon-menu {
  display: none;
}
.nav__burger[aria-expanded='true'] .icon-close {
  display: block;
}
.nav__menu {
  display: none;
  border-top: 1px solid var(--border);
  background: rgba(6, 8, 11, 0.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: 10px 22px 20px;
}
.nav__menu a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 15px;
  font-weight: 550;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  transition: color 0.2s var(--ease-out);
}
.nav__menu a:last-of-type {
  border-bottom: none;
}
.nav__menu a.active,
.nav__menu a:hover {
  color: var(--brand);
}
.nav__menu .btn {
  width: 100%;
  margin-top: 12px;
}
@media (max-width: 960px) {
  .nav__burger {
    display: grid;
  }
  .nav__cta {
    display: none;
  }
  .nav__menu.open {
    display: block;
    animation: menuIn 0.3s var(--ease-out);
  }
}
@keyframes menuIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
}

/* ---------- 回到顶部 ---------- */
.totop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(13, 17, 23, 0.82);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out),
    visibility 0.35s, color 0.25s, border-color 0.25s;
  z-index: 55;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.totop.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.totop:hover {
  color: var(--brand);
  border-color: rgba(15, 203, 155, 0.5);
}
.totop svg {
  width: 18px;
  height: 18px;
}

/* ---------- 宽屏适配样机 ---------- */
.adapt__chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 34px;
}
.adapt__chips span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 550;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 8px 16px;
}
.adapt__chips b {
  color: var(--brand);
  font-weight: 650;
}
.desktop-mock {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  background: linear-gradient(170deg, #10151c 0%, #0a0e13 100%);
  box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.85), 0 0 60px -30px rgba(15, 203, 155, 0.25);
}
.dm__bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.dm__dots {
  display: flex;
  gap: 6px;
}
.dm__dots i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
}
.dm__dots i:nth-child(1) { background: rgba(255, 95, 87, 0.75); }
.dm__dots i:nth-child(2) { background: rgba(255, 189, 46, 0.75); }
.dm__dots i:nth-child(3) { background: rgba(40, 200, 64, 0.75); }
.dm__title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.dm__body {
  display: grid;
  grid-template-columns: 196px 1fr;
  min-height: 380px;
}
.dm__side {
  border-right: 1px solid var(--border);
  padding: 14px 12px;
  display: grid;
  gap: 8px;
  align-content: start;
  background: rgba(255, 255, 255, 0.012);
}
.dm__page {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 12px;
  border: 1px solid transparent;
}
.dm__page.is-active {
  background: var(--brand-soft);
  border-color: rgba(15, 203, 155, 0.3);
}
.dm__thumb {
  width: 30px;
  height: 38px;
  border-radius: 4px;
  background: linear-gradient(180deg, #fff, #d7dee4);
  box-shadow: 0 3px 8px -3px rgba(0, 0, 0, 0.6);
  flex: none;
  position: relative;
  overflow: hidden;
}
.dm__thumb::after {
  content: '';
  position: absolute;
  inset: 6px 5px auto;
  height: 3px;
  border-radius: 2px;
  background: #9aa6b1;
  box-shadow: 0 6px 0 #c3ccd4, 0 12px 0 #c3ccd4, 0 18px 0 #c3ccd4;
}
.dm__meta {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.dm__meta b {
  font-size: 12px;
  font-weight: 650;
  color: var(--text);
  font-family: var(--font-mono);
}
.dm__meta i {
  font-style: normal;
  font-size: 10.5px;
  color: var(--text-dim);
}
.dm__page.is-active .dm__meta i {
  color: var(--brand);
}
.dm__main {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
}
.dm__preview {
  position: relative;
  display: grid;
  place-items: center;
  padding: 28px;
  background: radial-gradient(120% 100% at 50% 0%, #10151c 0%, #05070a 100%);
  border-right: 1px solid var(--border);
}
.dm__paper {
  position: relative;
  width: 74%;
  aspect-ratio: 3 / 4;
  background: linear-gradient(180deg, #ffffff, #e9eef2);
  border-radius: 6px;
  transform: rotate(-1.2deg);
  box-shadow: 0 22px 40px -14px rgba(0, 0, 0, 0.75);
  padding: 11% 11%;
}
.dm__paper i {
  display: block;
  height: 4px;
  border-radius: 2px;
  background: #b9c3cc;
  margin-bottom: 7px;
}
.dm__paper i:first-child {
  width: 52%;
  height: 6px;
  background: #33404d;
  margin-bottom: 10px;
}
.dm__paper i:nth-child(2) { width: 92%; }
.dm__paper i:nth-child(3) { width: 78%; }
.dm__paper i:nth-child(4) { width: 86%; }
.dm__paper i:nth-child(5) { width: 64%; }
.dm__paper i:nth-child(6) { width: 88%; }
.dm__corner {
  position: absolute;
  width: 13px;
  height: 13px;
  border: 2px solid var(--brand);
}
.dm__corner.tl { top: -6px; left: -6px; border-right: none; border-bottom: none; }
.dm__corner.tr { top: -6px; right: -6px; border-left: none; border-bottom: none; }
.dm__corner.br { bottom: -6px; right: -6px; border-left: none; border-top: none; }
.dm__corner.bl { bottom: -6px; left: -6px; border-right: none; border-top: none; }
.dm__badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 10px;
  font-weight: 750;
  font-family: var(--font-mono);
  color: var(--brand);
  background: rgba(6, 8, 11, 0.7);
  border: 1px solid rgba(15, 203, 155, 0.4);
  padding: 3px 9px;
  border-radius: 100px;
}
.dm__proof {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.dm__proof-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 650;
}
.dm__proof-head .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 8px var(--brand);
}
.dm__conf {
  margin-left: auto;
  font-size: 10.5px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid rgba(15, 203, 155, 0.3);
  padding: 2px 8px;
  border-radius: 100px;
}
.dm__lines {
  position: relative;
  display: grid;
  gap: 9px;
  flex: 1;
  align-content: start;
}
.dm__lines i {
  height: 7px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
}
.dm__lines i:nth-child(1) { width: 88%; }
.dm__lines i:nth-child(2) { width: 96%; }
.dm__lines i:nth-child(3) { width: 72%; }
.dm__lines i:nth-child(4) { width: 90%; }
.dm__lines i:nth-child(5) { width: 60%; }
.dm__lines i.hl {
  background: rgba(15, 203, 155, 0.25);
  box-shadow: inset 0 0 0 1px rgba(15, 203, 155, 0.4);
}
.dm__proof-foot {
  display: flex;
  gap: 10px;
}
.dm__pill {
  font-size: 11.5px;
  font-weight: 650;
  color: var(--ink);
  background: var(--brand-grad);
  padding: 7px 16px;
  border-radius: 100px;
}
.dm__pill--ghost {
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
}

/* ---------- FAQ ---------- */
.faq {
  max-width: 780px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.faq__item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.3s var(--ease-out);
}
.faq__item[open] {
  border-color: rgba(15, 203, 155, 0.35);
  background: linear-gradient(170deg, rgba(15, 203, 155, 0.05), rgba(255, 255, 255, 0.012));
}
.faq__item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 19px 22px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: color 0.25s var(--ease-out);
}
.faq__item summary::-webkit-details-marker {
  display: none;
}
.faq__item summary:hover {
  color: var(--brand);
}
.faq__icon {
  margin-left: auto;
  width: 17px;
  height: 17px;
  flex: none;
  color: var(--text-dim);
  transition: transform 0.35s var(--ease-out), color 0.25s;
}
.faq__item[open] .faq__icon {
  transform: rotate(180deg);
  color: var(--brand);
}
.faq__a {
  padding: 0 22px 20px;
  animation: faqIn 0.35s var(--ease-out);
}
.faq__a p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}
@keyframes faqIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
}

/* ---------- 上线提醒按钮组 ---------- */
.download__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 30px;
}

/* ---------- 404 ---------- */
.nf {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 80px 22px;
  text-align: center;
}
.nf__code {
  font-size: clamp(72px, 14vw, 128px);
  font-weight: 780;
  letter-spacing: -0.04em;
  line-height: 1;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nf h1 {
  margin: 18px 0 10px;
  font-size: 22px;
  font-weight: 700;
}
.nf p {
  color: var(--text-muted);
  font-size: 14.5px;
  margin-bottom: 30px;
}
.nf__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---------- 法律页打印 ---------- */
@media print {
  body::before,
  .nav,
  .footer,
  .skip-link {
    display: none !important;
  }
  body {
    background: #fff;
    color: #111;
  }
  .doc-card,
  .summary {
    background: none;
    border-color: #ddd;
    break-inside: avoid;
  }
  .doc-card p,
  .doc-card li,
  .summary__item span:not(.check) {
    color: #333;
  }
  .legal-hero {
    padding: 24px 0;
  }
}

/* ---------- v2 响应式补充 ---------- */
@media (max-width: 960px) {
  .dm__body {
    grid-template-columns: 1fr;
  }
  .dm__side {
    grid-auto-flow: column;
    grid-auto-columns: 120px;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .dm__main {
    grid-template-columns: 1fr;
  }
  .dm__preview {
    border-right: none;
    border-bottom: 1px solid var(--border);
    min-height: 300px;
  }
}
@media (max-width: 720px) {
  .faq__item summary {
    padding: 16px 18px;
    font-size: 14.5px;
  }
  .faq__a {
    padding: 0 18px 18px;
  }
  .totop {
    right: 14px;
    bottom: 14px;
  }
}

/* 修正:移动端菜单里的主按钮不被链接样式覆盖颜色 */
.nav__menu a.btn,
.nav__menu a.btn:hover {
  color: var(--ink);
  font-weight: 600;
  justify-content: center;
}