/* ==========================================================================
   织影 · 官网样式
   深色智能风 · 大气简约
   色值统一走 :root token，规则里不要写死颜色
   ========================================================================== */

:root {
  /* 底色：三层明度递增，拉开层次 */
  --ink: #04060b;
  --bg: #080b14;
  --panel: #0d111c;
  --panel-2: #121826;
  --panel-3: #1a2233;

  /* 描边 */
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --line-3: rgba(255, 255, 255, 0.22);

  /* 文字 */
  --text: #e8ecf5;
  --text-2: #9aa6bd;
  --text-3: #66718a;

  /* 品牌：青（无限环） + 橙（线） */
  --cyan: #22d3ee;
  --cyan-2: #67e8f9;
  --cyan-ink: #0b3b45;
  --cyan-glow: rgba(34, 211, 238, 0.16);
  --orange: #ff8a3d;
  --orange-glow: rgba(255, 138, 61, 0.16);
  --ok: #34d399;
  --warn: #f5a524;
  --danger: #ff6b6b;

  --radius-s: 10px;
  --radius: 16px;
  --radius-l: 22px;

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

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

  --shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.75);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--cyan); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 排版工具 ---------- */

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section--tight { padding: 68px 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

.h2 { font-size: 34px; letter-spacing: -0.02em; }
.lead {
  margin-top: 16px;
  max-width: 720px;
  color: var(--text-2);
  font-size: 16.5px;
}
.section-head { margin-bottom: 52px; }

.accent { color: var(--cyan); }

/* ---------- 顶栏 ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease;
}
.header.is-stuck {
  background: rgba(8, 11, 20, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: var(--line);
}
.header .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 34px; height: 34px; flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-size: 17px; font-weight: 600; letter-spacing: 0.06em; }
.brand__sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-3);
  text-transform: uppercase;
}

.nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.nav a {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14.5px;
  color: var(--text-2);
  transition: color 0.18s ease, background 0.18s ease;
}
.nav a:hover { color: var(--text); background: var(--panel-2); }
.nav a.is-active { color: var(--text); background: var(--panel-2); }

.header__cta { margin-left: 10px; }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1.5px;
  background: currentColor;
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 46px;
  padding: 0 22px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: var(--panel-2);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.16s ease, background 0.18s ease,
    border-color 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}
.btn:hover { background: var(--panel-3); border-color: var(--line-3); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, var(--cyan-2), var(--cyan));
  border-color: transparent;
  color: #04222a;
  font-weight: 600;
  box-shadow: 0 12px 30px -12px var(--cyan-glow), 0 0 0 1px rgba(34, 211, 238, 0.25);
}
.btn--primary:hover {
  background: linear-gradient(135deg, #8df1ff, var(--cyan-2));
  border-color: transparent;
  box-shadow: 0 16px 40px -12px var(--cyan-glow), 0 0 0 1px rgba(34, 211, 238, 0.35);
}

.btn--ghost { background: transparent; }
.btn--ghost:hover { background: var(--panel-2); }

.btn--sm { height: 38px; padding: 0 16px; font-size: 14px; border-radius: 10px; }
.btn--lg { height: 54px; padding: 0 30px; font-size: 16px; border-radius: 14px; }
.btn--block { width: 100%; }

.btn[disabled],
.btn.is-disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
  box-shadow: none;
}
.btn[disabled]:hover,
.btn.is-disabled:hover { transform: none; background: var(--panel-2); border-color: var(--line-2); }

.btn__icon { width: 18px; height: 18px; flex: none; }

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  padding: 88px 0 76px;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: -20% -10% 0;
  pointer-events: none;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 32%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 32%, #000 30%, transparent 78%);
  opacity: 0.7;
}
.hero__glow {
  position: absolute;
  width: 780px;
  height: 780px;
  left: 50%;
  top: -300px;
  transform: translateX(-50%);
  background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 62%);
  filter: blur(20px);
}
.hero__glow--warm {
  left: auto;
  right: -180px;
  top: -140px;
  width: 520px;
  height: 520px;
  transform: none;
  background: radial-gradient(circle, var(--orange-glow) 0%, transparent 65%);
}
.hero .wrap { position: relative; }

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
  text-align: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 7px 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(18, 24, 38, 0.7);
  font-size: 13px;
  color: var(--text-2);
}
.tag__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--cyan-glow);
}
.tag__sep { width: 1px; height: 14px; background: var(--line-2); }

.hero h1 {
  margin-top: 26px;
  font-size: clamp(38px, 6vw, 66px);
  letter-spacing: -0.035em;
  line-height: 1.1;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--cyan-2) 10%, #a9f0ff 45%, var(--orange) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__desc {
  margin-top: 24px;
  max-width: 660px;
  color: var(--text-2);
  font-size: 17.5px;
}

.hero__actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.hero__note {
  margin-top: 18px;
  font-size: 13.5px;
  color: var(--text-3);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: center;
}

/* 能力小条 */
.strip {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(180deg, rgba(18, 24, 38, 0.7), rgba(8, 11, 20, 0.4));
  overflow: hidden;
}
.strip__item { padding: 26px 24px; border-left: 1px solid var(--line); }
.strip__item:first-child { border-left: 0; }
.strip__k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.strip__v { margin-top: 10px; font-size: 17px; font-weight: 500; }
.strip__d { margin-top: 6px; font-size: 13.5px; color: var(--text-3); line-height: 1.6; }

/* ---------- 编辑器外观演示（纯 CSS 绘制，非截图） ---------- */

.showcase { position: relative; }

.window {
  border: 1px solid var(--line-2);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.window__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 16px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}
.window__dots { display: flex; gap: 7px; }
.window__dots i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--panel-3);
  border: 1px solid var(--line-2);
}
.window__title {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.06em;
}

.mock {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr) 232px;
  gap: 1px;
  background: var(--line);
  min-height: 430px;
}
.mock__col { background: var(--bg); padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.mock__label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.mock__count { color: var(--cyan); }

.mock__chip {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel-2);
  font-size: 12.5px;
  color: var(--text-2);
}
.mock__chip.is-on { border-color: var(--line-3); color: var(--text); }
.mock__thumb {
  width: 30px;
  height: 22px;
  border-radius: 4px;
  flex: none;
  background: linear-gradient(135deg, var(--panel-3), var(--cyan-ink));
  border: 1px solid var(--line-2);
}

.mock__stage {
  position: relative;
  border-radius: 10px;
  flex: 1;
  min-height: 240px;
  background: linear-gradient(160deg, #10151f, #070a11 60%);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.mock__frame {
  width: 108px;
  height: 192px;
  border-radius: 8px;
  background: linear-gradient(150deg, rgba(34, 211, 238, 0.22), rgba(255, 138, 61, 0.16));
  border: 1px solid var(--line-2);
  position: relative;
}
.mock__frame::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 12px;
  height: 9px;
  border-radius: 3px;
  background: rgba(4, 6, 11, 0.7);
  box-shadow: 0 -16px 0 -3px rgba(4, 6, 11, 0.45);
}
.mock__sticker {
  position: absolute;
  top: 34px;
  right: 26px;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--orange), #ffb27a);
  opacity: 0.85;
  box-shadow: 0 8px 24px -8px var(--orange-glow);
}
.mock__scrub {
  height: 26px;
  border-radius: 8px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
}
.mock__bar {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--panel-3);
  position: relative;
}
.mock__bar::after {
  content: "";
  position: absolute;
  inset: 0 58% 0 0;
  border-radius: 2px;
  background: var(--cyan);
}
.mock__time { font-family: var(--mono); font-size: 11px; color: var(--text-3); }

.mock__sent {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  padding: 8px 10px;
  border-radius: 9px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.5;
}
.mock__sent--keep { border-left: 2px solid var(--cyan); }
.mock__sent--drop { border-left: 2px solid var(--line-3); opacity: 0.66; }
.mock__sent--grouped { border-left: 2px solid var(--orange); background: rgba(255, 138, 61, 0.06); }
.mock__t { font-family: var(--mono); font-size: 10.5px; color: var(--text-3); flex: none; padding-top: 2px; }

.mock__timeline {
  grid-column: 1 / -1;
  background: var(--bg);
  padding: 14px;
  display: flex;
  gap: 8px;
  align-items: stretch;
  border-top: 1px solid var(--line);
}
.mock__block {
  height: 52px;
  border-radius: 7px;
  background: linear-gradient(160deg, var(--panel-3), var(--panel-2));
  border: 1px solid var(--line-2);
  position: relative;
  overflow: hidden;
}
.mock__block::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 4px;
  background: repeating-linear-gradient(
    90deg,
    rgba(34, 211, 238, 0.14) 0 6px,
    transparent 6px 12px
  );
}

/* ---------- 卡片网格 ---------- */

.grid { display: grid; gap: 18px; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  position: relative;
  padding: 28px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 24, 38, 0.66), rgba(13, 17, 28, 0.66));
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.card:hover {
  border-color: var(--line-2);
  background: linear-gradient(180deg, rgba(26, 34, 51, 0.7), rgba(13, 17, 28, 0.7));
  transform: translateY(-2px);
}
.card__icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  background: var(--panel-2);
  color: var(--cyan);
  margin-bottom: 20px;
}
.card__icon svg { width: 21px; height: 21px; }
.card__icon--warm { color: var(--orange); }
.card__idx {
  position: absolute;
  top: 26px;
  right: 26px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
}
.card h3 { font-size: 18px; }
.card p { margin-top: 12px; color: var(--text-2); font-size: 14.5px; }
.card__list { margin-top: 16px; display: grid; gap: 9px; }
.card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-2);
}
.card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.7;
}

/* ---------- 工作流 ---------- */

.flow { display: grid; gap: 0; border-top: 1px solid var(--line); }
.flow__row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.flow__no {
  font-family: var(--mono);
  font-size: 26px;
  color: var(--text-3);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}
.flow__row:hover .flow__no { color: var(--cyan); }
.flow__title { font-size: 19px; }
.flow__meta {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.flow__desc { color: var(--text-2); font-size: 14.5px; }

/* ---------- 场景 ---------- */

.scene {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.scene__item { background: var(--panel); padding: 28px 24px; }
.scene__item h4 { font-size: 16px; }
.scene__item p { margin-top: 10px; font-size: 14px; color: var(--text-3); line-height: 1.65; }

/* ---------- 下载 ---------- */

.dl-band {
  position: relative;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-l);
  background: radial-gradient(circle at 18% 0%, var(--cyan-glow), transparent 58%),
    linear-gradient(180deg, var(--panel-2), var(--panel));
  padding: 52px 48px;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}
.dl-band h2 { font-size: 30px; }
.dl-band p { margin-top: 14px; color: var(--text-2); }
.dl-band__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.dl-band__side {
  border-left: 1px solid var(--line);
  padding-left: 40px;
  display: grid;
  gap: 16px;
}
.kv { display: flex; justify-content: space-between; gap: 16px; font-size: 14px; }
.kv dt { color: var(--text-3); }
.kv dd { margin: 0; color: var(--text); font-family: var(--mono); font-size: 13px; }

/* 下载卡片（下载页） */
.plat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.plat--ready { border-color: rgba(34, 211, 238, 0.3); }
.plat__head { display: flex; align-items: center; gap: 14px; }
.plat__icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: var(--panel-2);
  border: 1px solid var(--line-2);
  color: var(--text);
  flex: none;
}
.plat__icon svg { width: 24px; height: 24px; }
.plat__name { font-size: 17px; font-weight: 600; }
.plat__sub { font-size: 13px; color: var(--text-3); font-family: var(--mono); }
.plat__body { color: var(--text-2); font-size: 14.5px; flex: 1; }
.plat__foot { display: flex; flex-direction: column; gap: 12px; }

.state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--line-2);
  color: var(--text-2);
}
.state i { width: 6px; height: 6px; border-radius: 50%; background: var(--text-3); }
.state--ready { color: var(--ok); border-color: rgba(52, 211, 153, 0.3); }
.state--ready i { background: var(--ok); }
.state--wip { color: var(--warn); border-color: rgba(245, 165, 36, 0.3); }
.state--wip i { background: var(--warn); }

/* ---------- 表格 ---------- */

.table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  overflow-x: auto;
}
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th, td { padding: 15px 22px; text-align: left; font-size: 14px; }
thead th {
  background: var(--panel-2);
  color: var(--text-3);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
}
tbody tr + tr td { border-top: 1px solid var(--line); }
tbody tr:hover td { background: rgba(26, 34, 51, 0.4); }
td:first-child { color: var(--text); }
td { color: var(--text-2); }
td code, p code, li code {
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 2px 7px;
  border-radius: 6px;
  background: var(--panel-3);
  border: 1px solid var(--line);
  color: var(--cyan-2);
}

/* 命令行 / 校验值 */
.code-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--ink);
}
.code-row code {
  flex: 1;
  min-width: 220px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--cyan-2);
  word-break: break-all;
}

/* ---------- FAQ ---------- */

.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  transition: color 0.18s ease;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--cyan-2); }
.faq summary::after {
  content: "";
  margin-left: auto;
  width: 11px;
  height: 11px;
  flex: none;
  border-right: 1.5px solid var(--text-3);
  border-bottom: 1.5px solid var(--text-3);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.22s ease;
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-2px); }
.faq summary::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.75;
}
.faq__body { padding: 0 0 24px 22px; color: var(--text-2); font-size: 14.5px; max-width: 860px; }
.faq__body ul { display: grid; gap: 8px; margin-top: 12px; }
.faq__body li { position: relative; padding-left: 16px; }
.faq__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-3);
}

/* ---------- 页内锚点导航 ---------- */

.page-head {
  padding: 60px 0 12px;
  border-bottom: 1px solid var(--line);
}
.page-head h1 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -0.03em; }
.page-head p { margin-top: 16px; color: var(--text-2); max-width: 720px; font-size: 16.5px; }
.page-head__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 22px 0 0;
}
.page-head__nav a {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--text-2);
  transition: all 0.18s ease;
}
.page-head__nav a:hover { border-color: var(--line-3); color: var(--text); background: var(--panel-2); }

/* ---------- 细节块 ---------- */

.feature-block {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 46px;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.feature-block:last-of-type { border-bottom: 0; }
.feature-block__head { position: sticky; top: calc(var(--header-h) + 24px); }
.feature-block__k {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.feature-block__head h2 { margin-top: 14px; font-size: 26px; }
.feature-block__head p { margin-top: 14px; color: var(--text-2); font-size: 14.5px; }
.feature-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.feature-list__item { background: var(--panel); padding: 22px 24px; }
.feature-list__item h4 { font-size: 15.5px; display: flex; align-items: center; gap: 10px; }
.feature-list__item h4::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--cyan);
  flex: none;
}
.feature-list__item p { margin-top: 9px; font-size: 14px; color: var(--text-2); }

/* 步骤 */
.steps { display: grid; gap: 18px; counter-reset: s; }
.step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 22px;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.step__no {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--cyan);
  background: var(--panel-2);
  border: 1px solid var(--line-2);
}
.step h3 { font-size: 18px; }
.step p { margin-top: 10px; color: var(--text-2); font-size: 14.5px; }
.step ul { margin-top: 12px; display: grid; gap: 8px; }
.step li { position: relative; padding-left: 18px; font-size: 14px; color: var(--text-2); }
.step li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.7;
}

.callout {
  margin-top: 22px;
  padding: 20px 24px;
  border: 1px solid var(--line-2);
  border-left: 2px solid var(--orange);
  border-radius: var(--radius-s);
  background: rgba(255, 138, 61, 0.05);
  font-size: 14px;
  color: var(--text-2);
}
.callout strong { color: var(--text); font-weight: 600; }

/* ---------- 页脚 ---------- */

.footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 56px 0 40px;
  background: var(--ink);
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, 1fr));
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer__about { color: var(--text-3); font-size: 13.5px; max-width: 380px; }
.footer h5 {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
}
.footer__links { display: grid; gap: 11px; }
.footer__links a { color: var(--text-3); font-size: 14px; transition: color 0.18s ease; }
.footer__links a:hover { color: var(--cyan-2); }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding-top: 26px;
  color: var(--text-3);
  font-size: 13px;
}
.footer__bottom a { color: var(--text-3); transition: color 0.18s ease; }
.footer__bottom a:hover { color: var(--text-2); }
.footer__dot { width: 3px; height: 3px; border-radius: 50%; background: var(--text-3); }
.footer__sep { flex: 1; }

/* ---------- 动效 ---------- */

.reveal { opacity: 0; transform: translateY(18px); }
.reveal.in { opacity: 1; transform: none; transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .reveal.in { transition: none; }
}

/* ---------- 响应式 ---------- */

@media (max-width: 1040px) {
  .mock { grid-template-columns: 140px minmax(0, 1fr); }
  .mock__col--right { display: none; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scene { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-block { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .feature-block__head { position: static; }
}

@media (max-width: 860px) {
  .section { padding: 68px 0; }
  .hero { padding: 60px 0 52px; }
  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 24px 20px;
    background: rgba(8, 11, 20, 0.97);
    border-bottom: 1px solid var(--line);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 14px; }
  .nav-toggle { display: flex; }
  .header__cta { display: none; }
  .strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .strip__item:nth-child(3) { border-left: 0; }
  .strip__item:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .grid--2 { grid-template-columns: minmax(0, 1fr); }
  .flow__row { grid-template-columns: 60px minmax(0, 1fr); gap: 16px; }
  .flow__desc { grid-column: 2; }
  .dl-band { grid-template-columns: minmax(0, 1fr); padding: 34px 26px; gap: 28px; }
  .dl-band__side { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; padding-top: 24px; }
  .footer__top { grid-template-columns: minmax(0, 1fr); gap: 30px; }
}

@media (max-width: 620px) {
  .wrap { padding: 0 20px; }
  .h2 { font-size: 26px; }
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .scene { grid-template-columns: minmax(0, 1fr); }
  .strip { grid-template-columns: minmax(0, 1fr); }
  .strip__item { padding: 22px 20px; border-left: 0; }
  .strip__item:nth-child(n + 2) { border-top: 1px solid var(--line); }
  .mock { grid-template-columns: minmax(0, 1fr); }
  .mock__col--left { display: none; }
  .step { grid-template-columns: minmax(0, 1fr); gap: 16px; padding: 22px; }
  .hero__actions .btn { width: 100%; }
}