@charset "UTF-8";
/* ==========================================================================
   FrostWire 中文站 — 全站样式
   配色取自 FrostWire logo 蓝色玻璃球：
   高光 #A0D0F0 / 亮蓝 #57A9E2 / 主蓝 #2870B8 / 深蓝 #1B5286 / 暗部 #2058A0
   风格：扁平现代专业，浅色主题，无 emoji 图标
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --brand:        #2A7BC4;
  --brand-600:    #22699F;
  --brand-700:    #1B5286;
  --brand-800:    #143F68;
  --brand-400:    #57A9E2;
  --brand-300:    #8CC6EE;
  --brand-200:    #C7E3F8;
  --brand-100:    #E4F1FB;
  --brand-050:    #F4FAFE;

  --ink:          #12202E;
  --ink-2:        #3D5366;
  --ink-3:        #6B7F92;

  --line:         #DCE8F3;
  --line-soft:    #EDF4FA;
  --white:        #FFFFFF;

  --ok:           #1F8A5B;
  --ok-bg:        #E8F5EF;
  --warn:         #A9701A;
  --warn-bg:      #FDF3E3;

  --radius-sm:    6px;
  --radius:       10px;
  --radius-lg:    16px;
  --radius-pill:  999px;

  --shadow-xs:    0 1px 2px rgba(18, 32, 46, .05);
  --shadow-sm:    0 2px 8px rgba(27, 82, 134, .07);
  --shadow:       0 6px 20px rgba(27, 82, 134, .09);
  --shadow-lg:    0 18px 48px rgba(20, 63, 104, .16);

  --maxw:         1180px;
  --header-h:     68px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  margin: 0 0 .6em;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: -.01em;
}
h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.02em; }
h2 { font-size: clamp(24px, 2.6vw, 33px); letter-spacing: -.015em; }
h3 { font-size: 19px; }
h4 { font-size: 16px; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--brand); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--brand-700); }

img { max-width: 100%; height: auto; border: 0; }

ul, ol { margin: 0 0 1em; padding-left: 1.35em; }
li { margin-bottom: .35em; }

strong { font-weight: 700; color: var(--ink); }

code {
  font-family: var(--font-mono);
  font-size: .875em;
  background: var(--brand-050);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: .1em .38em;
  color: var(--brand-700);
}

hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  top: -60px; left: 16px;
  z-index: 999;
  background: var(--brand-700);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius) var(--radius);
  font-size: 14px;
  transition: top .2s ease;
}
.skip-link:focus { top: 0; color: #fff; }

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

.section { padding: 78px 0; }
.section--tight { padding: 56px 0; }
.section--tint { background: var(--brand-050); }
.section--rule { border-top: 1px solid var(--line-soft); }

.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--ink-2); font-size: 17px; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 12px;
}

.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* 防止 flex / grid 子项被长内容撑破容器（min-width 默认为 auto 会拒绝收缩） */
.hero__inner > *,
.feature-row > *,
.cta-band > *,
.grid > * { min-width: 0; }

/* ---------- 4. 页头导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--ink);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.02em;
}
.brand:hover { color: var(--ink); }
.brand img { width: 32px; height: 32px; display: block; }
.brand__cn {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-3);
  letter-spacing: 0;
  padding-left: 10px;
  margin-left: 2px;
  border-left: 1px solid var(--line);
  line-height: 1.2;
}

.nav { margin-left: auto; }
.nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__list li { margin: 0; }
.nav__link {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
  white-space: nowrap;
}
.nav__link:hover { background: var(--brand-050); color: var(--brand-700); }
.nav__link[aria-current="page"] { color: var(--brand-700); font-weight: 700; background: var(--brand-100); }

.header-cta { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--ink-2);
  padding: 0;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color .18s ease, border-color .18s ease,
              color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.btn:active { transform: translateY(1px); }
.btn svg { flex-shrink: 0; }

.btn--primary { background: var(--brand); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--brand-700); color: #fff; box-shadow: var(--shadow); }

.btn--outline { background: var(--white); color: var(--brand-700); border-color: var(--brand-200); }
.btn--outline:hover { background: var(--brand-050); border-color: var(--brand-400); color: var(--brand-700); }

.btn--ghost { background: transparent; color: var(--ink-2); }
.btn--ghost:hover { background: var(--brand-050); color: var(--brand-700); }

.btn--light { background: #fff; color: var(--brand-700); }
.btn--light:hover { background: var(--brand-050); color: var(--brand-800); }

.btn--lg { padding: 15px 32px; font-size: 16px; }
.btn--sm { padding: 9px 16px; font-size: 14px; }
.btn--block { display: flex; width: 100%; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---------- 6. 首页 Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1000px 460px at 78% -8%, rgba(160, 208, 240, .40) 0%, rgba(244, 250, 254, 0) 62%),
    linear-gradient(180deg, var(--brand-050) 0%, var(--white) 100%);
  border-bottom: 1px solid var(--line-soft);
  padding: 74px 0 82px;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: 56px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  border: 1px solid var(--brand-200);
  border-radius: var(--radius-pill);
  padding: 6px 15px 6px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-700);
  margin-bottom: 22px;
  box-shadow: var(--shadow-xs);
}
.hero__badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(31, 138, 91, .16);
}

.hero h1 { margin-bottom: 18px; }
.hero h1 .accent { color: var(--brand); }

.hero__lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 560px;
  margin-bottom: 30px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  list-style: none;
  padding-left: 0;
}
.hero__meta li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 14px;
  color: var(--ink-2);
}
.hero__meta svg { color: var(--brand); flex-shrink: 0; }

/* Hero 右侧视觉：应用界面截图 */
.app-visual {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.app-visual > img {
  display: block;
  width: 100%;
  height: auto;
}
.app-visual__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--brand-050);
  border-bottom: 1px solid var(--line);
}
.app-visual__bar span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--brand-200);
  flex-shrink: 0;
}
.app-visual__bar .app-visual__title {
	width:auto;
  margin-left: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  background: none;
}
.app-visual__body { padding: 18px; }
.app-search {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  border: 1px solid var(--brand-200);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--ink-3);
  font-size: 14px;
  background: var(--white);
}
.app-search > svg { flex-shrink: 0; color: var(--brand); }
.app-search > span { min-width: 0; overflow-wrap: anywhere; }
.app-rows { margin-top: 16px; display: grid; gap: 9px; }
.app-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--brand-050);
}
.app-row__icon {
  width: 30px; height: 30px;
  border-radius: var(--radius-sm);
  background: var(--brand-100);
  color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.app-row__lines { flex: 1; min-width: 0; }
.app-row__l1 {
  height: 9px; border-radius: 3px;
  background: var(--brand-200);
  width: 72%;
}
.app-row__l2 {
  height: 7px; border-radius: 3px;
  background: var(--line);
  width: 44%;
  margin-top: 6px;
}
.app-row__pct {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--brand-700);
  flex-shrink: 0;
}
.app-track {
  height: 5px;
  border-radius: 3px;
  background: var(--brand-100);
  margin-top: 14px;
  overflow: hidden;
}
.app-track i {
  display: block;
  height: 100%;
  width: 68%;
  background: var(--brand);
  border-radius: 3px;
}
.app-visual__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  justify-content: space-between;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--ink-3);
  margin-top: 10px;
}

/* ---------- 7. 卡片 ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.card--hover:hover {
  border-color: var(--brand-300);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.card__icon {
  width: 46px; height: 46px;
  border-radius: var(--radius);
  background: var(--brand-100);
  color: var(--brand-700);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--ink-2); font-size: 15px; margin: 0; }
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 700;
}
.card__link svg { transition: transform .18s ease; }
.card__link:hover svg { transform: translateX(3px); }

/* 使用场景卡（带序号，无 emoji） */
.scene {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 24px 24px;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.scene::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--brand-300);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.scene:hover { border-color: var(--brand-300); box-shadow: var(--shadow); transform: translateY(-2px); }
.scene:hover::before { transform: scaleX(1); }
.scene__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--brand);
  margin-bottom: 14px;
  display: block;
}
.scene__icon {
  width: 40px; height: 40px;
  border-radius: var(--radius);
  background: var(--brand-050);
  border: 1px solid var(--brand-100);
  color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.scene h3 { font-size: 17px; margin-bottom: 8px; }
.scene p { font-size: 14.5px; color: var(--ink-2); margin: 0; }
.scene ul {
  margin: 14px 0 0;
  padding-left: 0;
  list-style: none;
  font-size: 14px;
  color: var(--ink-2);
}
.scene ul li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 5px;
}
.scene ul li::before {
  content: "";
  position: absolute;
  left: 3px; top: .68em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--brand-300);
}

/* ---------- 8. 特性行（图文交替） ---------- */
.feature-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 52px;
  align-items: center;
  padding: 46px 0;
}
.feature-row + .feature-row { border-top: 1px solid var(--line-soft); }
.feature-row--flip .feature-row__media { order: -1; }
.feature-row h3 { font-size: clamp(20px, 2vw, 25px); margin-bottom: 14px; }
.feature-row p { color: var(--ink-2); }
.feature-row__list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  gap: 10px;
}
.feature-row__list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 0;
  font-size: 15px;
  color: var(--ink-2);
}
.feature-row__list svg { color: var(--brand); flex-shrink: 0; margin-top: 5px; }
.feature-row__media {
  background: var(--brand-050);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
}
.feature-row__media--plain { background: none; border: 0; padding: 0; }

/* 技术指标小表格 */
.spec-grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.spec-grid__row { display: grid; grid-template-columns: 150px 1fr; background: var(--white); }
.spec-grid__row > * { padding: 12px 16px; font-size: 14.5px; }
.spec-grid__row dt { background: var(--brand-050); color: var(--ink-2); font-weight: 600; margin: 0; }
.spec-grid__row dd { margin: 0; font-family: var(--font-mono); font-size: 13.5px; color: var(--brand-700); word-break: break-word; }

/* ---------- 9. 数据条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat { background: var(--white); padding: 26px 22px; text-align: center; }
.stat__num {
  font-size: 28px;
  font-weight: 700;
  color: var(--brand-700);
  line-height: 1.2;
  letter-spacing: -.02em;
}
.stat__label { font-size: 13.5px; color: var(--ink-3); margin-top: 6px; }

/* ---------- 10. 表格 ---------- */
.table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  background: var(--white);
}
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 620px;
}
table.data caption {
  caption-side: top;
  text-align: left;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--ink-3);
  border-bottom: 1px solid var(--line-soft);
}
table.data th, table.data td {
  padding: 13px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: middle;
}
table.data thead th {
  background: var(--brand-050);
  color: var(--brand-800);
  font-size: 13.5px;
  font-weight: 700;
  white-space: nowrap;
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover { background: var(--brand-050); }
table.data td.yes { color: var(--ok); font-weight: 700; }
table.data td.no { color: var(--ink-3); }

/* ---------- 11. 下载卡片 ---------- */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.dl-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.dl-card:hover { border-color: var(--brand-300); box-shadow: var(--shadow); }
.dl-card--featured { border-color: var(--brand-400); box-shadow: var(--shadow); }
.dl-card__top { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.dl-card__os {
  width: 42px; height: 42px;
  border-radius: var(--radius);
  background: var(--brand-050);
  border: 1px solid var(--brand-100);
  color: var(--brand-700);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.dl-card h3 { margin: 0; font-size: 17px; }
.dl-card__sub { font-size: 13px; color: var(--ink-3); margin: 2px 0 0; }
.dl-card__specs {
  list-style: none;
  padding: 0; margin: 0 0 20px;
  font-size: 13.5px;
  color: var(--ink-2);
  display: grid; gap: 7px;
  flex: 1;
}
.dl-card__specs li { display: flex; justify-content: space-between; gap: 14px; margin: 0; min-width: 0; }
.dl-card__specs li > * { min-width: 0; }
.dl-card__specs span:last-child { font-family: var(--font-mono); font-size: 12.5px; color: var(--brand-700); text-align: right; overflow-wrap: anywhere; }
.dl-card .btn { margin-top: auto; }

.tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--brand-100);
  color: var(--brand-700);
}
.tag--ok { background: var(--ok-bg); color: var(--ok); }
.tag--warn { background: var(--warn-bg); color: var(--warn); }

/* ---------- 12. 下载弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal.is-open { display: flex; }
.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(12, 30, 48, .55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  animation: fadeIn .18s ease;
}
.modal__dialog {
  position: relative;
  width: 100%;
  max-width: 560px;
  max-height: calc(100dvh - 40px);
  overflow-y: auto;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: popIn .22s cubic-bezier(.2, .8, .3, 1);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn {
  from { opacity: 0; transform: translateY(14px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 24px 0;
}
.modal__head > div { min-width: 0; }
.modal__head h2 { font-size: 21px; margin: 0 0 4px; }
.modal__head p { font-size: 14px; color: var(--ink-3); margin: 0; }
.modal__close {
  margin-left: auto;
  width: 34px; height: 34px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--brand-050);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink-2);
  cursor: pointer;
  padding: 0;
}
.modal__close:hover { background: var(--brand-100); color: var(--brand-700); }
.modal__body { padding: 22px 24px 26px; }

.qr-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.qr-box {
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 12px 14px;
  background: var(--brand-050);
}
.qr-box img {
  width: 100%;
  max-width: 190px;
  aspect-ratio: 1 / 1;
  height: auto;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 6px;
  border: 1px solid var(--line);
}
.qr-box__title {
  font-size: 14.5px;
  font-weight: 700;
  margin-top: 12px;
  color: var(--ink);
}
.qr-box__hint { font-size: 12.5px; color: var(--ink-3); margin-top: 3px; }

.modal__note {
  margin-top: 18px;
  padding: 13px 16px;
  border-radius: var(--radius);
  background: var(--brand-050);
  border: 1px solid var(--brand-100);
  font-size: 13.5px;
  color: var(--ink-2);
}
.modal__note strong { color: var(--brand-800); }
.modal__links {
  margin-top: 16px;
  font-size: 13.5px;
  color: var(--ink-2);
}

/* ---------- 13. 步骤 ---------- */
.steps { counter-reset: step; display: grid; gap: 22px; }
.step {
  position: relative;
  padding-left: 62px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0; top: 0;
  width: 42px; height: 42px;
  border-radius: var(--radius);
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
}
.step::after {
  content: "";
  position: absolute;
  left: 21px; top: 50px; bottom: -22px;
  width: 1px;
  background: var(--line);
}
.step:last-child::after { display: none; }
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--ink-2); font-size: 15px; margin: 0; }
.step ul { margin: 10px 0 0; font-size: 14.5px; color: var(--ink-2); }

/* ---------- 14. FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  position: relative;
  cursor: pointer;
  padding: 20px 44px 20px 0;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ink);
  list-style: none;
  transition: color .18s ease;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  position: absolute;
  right: 10px; top: 50%;
  width: 9px; height: 9px;
  border-right: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .22s ease;
}
.faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq summary:hover { color: var(--brand-700); }
.faq__answer { padding: 0 44px 22px 0; color: var(--ink-2); font-size: 15px; }
.faq__answer p { margin-bottom: .8em; }
.faq__answer ul { margin-bottom: .8em; }

/* ---------- 15. CTA 区块 ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--brand-700) 0%, var(--brand) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 46px 44px;
  display: flex;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
}
.cta-band h2 { color: #fff; margin-bottom: 8px; font-size: clamp(21px, 2.2vw, 27px); }
.cta-band p { color: rgba(255, 255, 255, .88); margin: 0; font-size: 15.5px; max-width: 620px; }
.cta-band__actions { margin-left: auto; display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 16. 提示条 ---------- */
.notice {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--radius);
  background: var(--warn-bg);
  border: 1px solid #F0DDB8;
  font-size: 14.5px;
  color: #6F4A10;
}
.notice > * { min-width: 0; }
.notice svg { flex-shrink: 0; color: var(--warn); margin-top: 3px; }
.notice strong { color: #5A3B0A; }
.notice--info { background: var(--brand-050); border-color: var(--brand-100); color: var(--ink-2); }
.notice--info svg { color: var(--brand); }
.notice code { overflow-wrap: anywhere; }

/* ---------- 17. 面包屑 ---------- */
.breadcrumb {
  font-size: 13.5px;
  color: var(--ink-3);
  padding: 18px 0 0;
}
.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0; padding: 0;
}
.breadcrumb li { margin: 0; display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--brand-200); }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb [aria-current="page"] { color: var(--ink-2); font-weight: 600; }

/* ---------- 18. 内页头部 ---------- */
.page-hero {
  background:
    radial-gradient(760px 320px at 82% -20%, rgba(160, 208, 240, .34) 0%, rgba(244, 250, 254, 0) 65%),
    linear-gradient(180deg, var(--brand-050) 0%, var(--white) 100%);
  border-bottom: 1px solid var(--line-soft);
  padding: 34px 0 58px;
}
.page-hero h1 { font-size: clamp(27px, 3.2vw, 38px); margin-bottom: 14px; }
.page-hero__lead { font-size: 17px; color: var(--ink-2); max-width: 700px; margin: 0; }

/* ---------- 19. 页脚 ---------- */
.site-footer {
  background: #0E2C4A;
  color: rgba(255, 255, 255, .74);
  font-size: 14px;
  padding: 56px 0 26px;
  margin-top: 0;
}
.site-footer h3 {
  color: #fff;
  font-size: 14px;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.site-footer a { color: rgba(255, 255, 255, .74); }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand img { width: 32px; height: 32px; }
.footer-brand span { color: #fff; font-weight: 700; font-size: 18px; }
.footer-about p { color: rgba(255, 255, 255, .66); font-size: 13.5px; line-height: 1.75; max-width: 340px; }
.footer-list { list-style: none; margin: 0; padding: 0; }
.footer-list li { margin-bottom: 9px; }
.footer-bottom {
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  color: rgba(255, 255, 255, .56);
  font-size: 13px;
}
.footer-bottom p { margin: 0; }

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dl-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__inner { grid-template-columns: minmax(0, 1fr); gap: 42px; }
  .feature-row { gap: 36px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    display: none;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 12px 24px 20px;
    margin: 0;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
  }
  .nav.is-open { display: block; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav__link { padding: 13px 12px; font-size: 16px; }
  .header-cta .btn { display: none; }
  .header-cta .btn--primary { display: inline-flex; padding: 9px 16px; font-size: 14px; }

  .grid--3, .grid--2 { grid-template-columns: minmax(0, 1fr); }
  .dl-grid { grid-template-columns: minmax(0, 1fr); }
  .feature-row { grid-template-columns: minmax(0, 1fr); padding: 34px 0; }
  .feature-row--flip .feature-row__media { order: 0; }
  .section { padding: 58px 0; }
  .hero { padding: 52px 0 62px; }
  .cta-band { padding: 34px 26px; }
  .cta-band__actions { margin-left: 0; width: 100%; }
  .spec-grid__row { grid-template-columns: minmax(0, 1fr); }
  .spec-grid__row dt { border-bottom: 1px solid var(--line-soft); }
}

@media (max-width: 620px) {
  .container { padding: 0 18px; }
  .brand__cn { display: none; }
  .qr-pair { grid-template-columns: minmax(0, 1fr); }
  .stats { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .btn { width: 100%; }
  .btn-row .btn { width: 100%; }
  .header-cta .btn--primary { width: auto; }
  .modal__head, .modal__body { padding-left: 18px; padding-right: 18px; }
  .step { padding-left: 54px; }
  .step::before { width: 36px; height: 36px; font-size: 14px; }
  .step::after { left: 18px; top: 44px; }
  .faq summary { font-size: 15.5px; padding-right: 34px; }
  .faq__answer { padding-right: 0; }
}

/* ---------- 21. 打印 ---------- */
@media print {
  .site-header, .site-footer, .cta-band, .modal, .nav-toggle { display: none !important; }
  body { font-size: 12pt; color: #000; }
  .card, .dl-card, .scene { border-color: #ccc; box-shadow: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 9pt; color: #555; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}