/* ============================================================
   TaskPard 官网 · 武汉途思云辉网络科技有限公司
   深色主题 / 桌面端 AI 工作台视觉语言
   ============================================================ */

:root {
  --bg:        #08090d;
  --bg-2:      #0b0d12;
  --surface:   rgba(255, 255, 255, .035);
  --surface-2: rgba(255, 255, 255, .062);
  --border:    rgba(255, 255, 255, .085);
  --border-2:  rgba(255, 255, 255, .14);
  --text:      #f2f4f9;
  --muted:     #9aa3b8;
  --muted-2:   #697086;
  --brand:     #6366f1;
  --brand-2:   #a855f7;
  --brand-3:   #22d3ee;
  --ok:        #34d399;

  --grad: linear-gradient(120deg, #6366f1 0%, #a855f7 48%, #22d3ee 100%);
  --radius: 16px;
  --radius-lg: 20px;
  --max: 1160px;

  --shadow-lg: 0 40px 90px -40px rgba(0, 0, 0, .9), 0 0 0 1px rgba(255,255,255,.05);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
               'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
svg { display: block; }
ul { list-style: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 800px; }

::selection { background: rgba(99, 102, 241, .35); }

/* ===== 滚动入场（渐进增强） ===== */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1);
}
.js-ready .reveal.is-in { opacity: 1; transform: none; }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 80;
  background: rgba(8, 9, 13, .72);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18.5px; letter-spacing: -.3px; }
.logo-mark {
  width: 32px; height: 32px; display: block;
  filter: drop-shadow(0 5px 14px rgba(99, 102, 241, .5));
}
.logo-mark.sm { width: 26px; height: 26px; }
.nav-links { display: flex; gap: 28px; font-size: 14px; color: var(--muted); font-weight: 500; margin-left: auto; }
.nav-links a { transition: color .18s; }
.nav-links a:hover { color: var(--text); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 11px; font-weight: 600; white-space: nowrap;
  transition: transform .18s, box-shadow .18s, background .18s, border-color .18s, color .18s;
}
.btn-sm { padding: 9px 18px; font-size: 13.5px; }
.btn-lg { padding: 15px 34px; font-size: 15.5px; }
.btn-primary {
  color: #fff; background: var(--grad);
  box-shadow: 0 12px 30px -12px rgba(99, 102, 241, .95);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -14px rgba(99, 102, 241, 1); }
.btn-ghost {
  color: var(--text); border: 1px solid var(--border-2);
  background: rgba(255, 255, 255, .04);
}
.btn-ghost:hover { border-color: rgba(99, 102, 241, .6); color: #fff; transform: translateY(-2px); }

/* ============================================================
   Hero
   ============================================================ */
.hero { position: relative; padding: 92px 0 0; overflow: hidden; }
.hero-glow {
  position: absolute; inset: -30% 0 auto 50%; transform: translateX(-50%);
  width: 1200px; height: 800px; pointer-events: none;
  background:
    radial-gradient(closest-side, rgba(99, 102, 241, .30), transparent 72%),
    radial-gradient(closest-side, rgba(168, 85, 247, .22), transparent 70%);
  filter: blur(20px);
}
.hero-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 22%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 22%, #000 20%, transparent 78%);
}
.hero-inner { position: relative; text-align: center; }

/* 首屏应用图标 */
.hero-logo { position: relative; width: 86px; height: 86px; margin: 0 auto 24px; }
.hero-logo img {
  position: relative; z-index: 1;
  width: 100%; height: 100%;
  filter: drop-shadow(0 16px 34px rgba(99, 102, 241, .55));
}
.hero-logo-glow {
  position: absolute; left: 50%; top: 50%;
  width: 160px; height: 160px; transform: translate(-50%, -50%);
  background: radial-gradient(closest-side, rgba(139, 92, 246, .55), transparent 72%);
  filter: blur(20px);
}

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: #c7ccdd;
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--border-2);
  padding: 7px 16px; border-radius: 999px; margin-bottom: 28px;
  backdrop-filter: blur(8px);
}
.pill-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--brand-3);
  box-shadow: 0 0 10px 2px rgba(34, 211, 238, .8);
}

.hero h1 {
  font-size: clamp(38px, 7vw, 70px);
  line-height: 1.1; font-weight: 800; letter-spacing: -2px;
  margin-bottom: 26px;
}
.grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  max-width: 640px; margin: 0 auto 40px;
  font-size: 17px; line-height: 1.9; color: var(--muted);
}
.hero-sub strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 76px; }

/* ===== 产品窗口示意 ===== */
.app { position: relative; max-width: 1000px; margin: 0 auto; }
.app-glow {
  position: absolute; left: 50%; top: 8%; transform: translateX(-50%);
  width: 82%; height: 70%;
  background: radial-gradient(closest-side, rgba(99, 102, 241, .45), transparent 72%);
  filter: blur(56px); pointer-events: none;
}
.app-window {
  position: relative;
  border-radius: 16px 16px 0 0;
  background: linear-gradient(180deg, #12141b 0%, #0e1016 100%);
  border: 1px solid rgba(255, 255, 255, .11);
  border-bottom: none;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.app-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, .035);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.dot { width: 11px; height: 11px; border-radius: 50%; display: block; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.app-bar-title { margin-left: 10px; font-size: 12.5px; color: var(--muted-2); font-weight: 600; }
.app-bar-tabs { margin-left: auto; display: flex; gap: 4px; }
.app-tab {
  font-size: 12px; color: var(--muted-2); padding: 4px 12px; border-radius: 7px;
}
.app-tab.active { color: #fff; background: rgba(99, 102, 241, .22); }

.app-body { display: flex; min-height: 356px; }

.app-rail {
  flex: 0 0 54px; padding: 14px 0;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, .022);
  border-right: 1px solid rgba(255, 255, 255, .06);
}
.rail-item {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center; color: var(--muted-2);
}
.rail-item svg { width: 17px; height: 17px; }
.rail-item.active { color: #fff; background: rgba(99, 102, 241, .26); }

.app-list {
  flex: 0 0 186px; padding: 14px 10px;
  background: rgba(255, 255, 255, .012);
  border-right: 1px solid rgba(255, 255, 255, .06);
}
.list-search {
  font-size: 11.5px; color: var(--muted-2);
  padding: 7px 11px; border-radius: 8px; margin-bottom: 10px;
  background: rgba(255, 255, 255, .045);
  border: 1px solid rgba(255, 255, 255, .05);
}
.list-item {
  font-size: 12.5px; color: var(--muted);
  padding: 8px 11px; border-radius: 8px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.list-item.active { color: #fff; background: rgba(99, 102, 241, .2); font-weight: 600; }

.app-main { flex: 1; padding: 22px 24px; display: flex; flex-direction: column; gap: 20px; }

.msg { display: flex; gap: 14px; align-items: flex-start; }
.msg-avatar {
  flex: 0 0 32px; height: 32px; border-radius: 10px;
  display: grid; place-items: center; font-size: 12.5px; font-weight: 700;
}
.msg-avatar.u { background: rgba(255,255,255,.1); color: #fff; }
.msg-avatar.a { background: var(--grad); color: #fff; }
.msg-content { flex: 1; min-width: 0; }
.msg-content p { font-size: 13.5px; color: #dfe3ee; }
.msg-user .msg-content p {
  display: inline-block; background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.08);
  padding: 10px 14px; border-radius: 12px 12px 12px 4px;
}

.plan {
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 12px; background: rgba(255, 255, 255, .028);
  padding: 14px 16px;
}
.plan-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.plan-title { font-size: 12.5px; font-weight: 700; color: #e8ebf4; letter-spacing: .2px; }
.plan-badge {
  font-size: 10.5px; font-weight: 700; color: #fbbf24;
  background: rgba(251, 191, 36, .13); border: 1px solid rgba(251, 191, 36, .28);
  padding: 2px 9px; border-radius: 999px;
}
.plan-step {
  display: flex; align-items: center; gap: 10px;
  font-size: 12.5px; color: var(--muted); padding: 5px 0;
}
.step-dot {
  flex: 0 0 19px; height: 19px; border-radius: 50%;
  display: grid; place-items: center; font-size: 10px; font-weight: 700;
  background: rgba(255, 255, 255, .07); color: var(--muted-2);
}
.plan-step.done { color: var(--muted); }
.plan-step.done .step-dot { background: rgba(52, 211, 153, .18); color: var(--ok); }
.plan-step.running { color: #fff; font-weight: 600; }
.plan-step.running .step-dot {
  background: rgba(99, 102, 241, .3); color: #c7cbff;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, .14);
}
.msg-tools { display: flex; gap: 6px; margin-top: 12px; flex-wrap: wrap; }
.tool {
  font-size: 10.5px; font-family: 'SF Mono', ui-monospace, Menlo, monospace;
  color: #a9b0c6; background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  padding: 3px 9px; border-radius: 6px;
}
.typing { display: flex; gap: 4px; margin-top: 12px; }
.typing i {
  width: 6px; height: 6px; border-radius: 50%; background: var(--brand-2);
  animation: bounce 1.3s infinite ease-in-out;
}
.typing i:nth-child(2) { animation-delay: .18s; }
.typing i:nth-child(3) { animation-delay: .36s; }
@keyframes bounce { 0%, 60%, 100% { transform: translateY(0); opacity: .5; } 30% { transform: translateY(-5px); opacity: 1; } }

/* ===== 能力速览 ===== */
.strip { border-top: 1px solid rgba(255,255,255,.06); border-bottom: 1px solid rgba(255,255,255,.06); background: rgba(255,255,255,.012); }
.strip-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 34px 24px; }
.strip-item { text-align: center; }
.strip-item strong { display: block; font-size: 16px; font-weight: 700; letter-spacing: -.2px; }
.strip-item span { display: block; font-size: 13px; color: var(--muted-2); margin-top: 3px; }

/* ============================================================
   通用 section
   ============================================================ */
.section { padding: 104px 0; }
.section-deep { position: relative; }
.section-deep.alt { background: var(--bg-2); }
.collab { background: var(--bg-2); }
.scenes-sec { background: var(--bg-2); }
.about-sec { background: var(--bg-2); }

.head { text-align: center; margin-bottom: 60px; }
.eyebrow {
  font-size: 12.5px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--brand-3); margin-bottom: 14px;
}
.h2 {
  font-size: clamp(27px, 4vw, 42px); font-weight: 800; letter-spacing: -1.2px;
  line-height: 1.24; margin-bottom: 14px;
}
.h2.left { text-align: left; margin-bottom: 18px; }
.sub { font-size: 15.5px; color: var(--muted); line-height: 1.85; max-width: 620px; margin: 0 auto; }

/* ===== 核心能力卡片 ===== */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  position: relative; padding: 30px 26px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  transition: transform .25s cubic-bezier(.22,.61,.36,1), border-color .25s, box-shadow .25s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, .42);
  box-shadow: 0 28px 60px -30px rgba(99, 102, 241, .75);
}
.ico {
  width: 46px; height: 46px; border-radius: 13px; margin-bottom: 20px;
  display: grid; place-items: center; color: #cfd3ff;
  background: rgba(99, 102, 241, .14);
  border: 1px solid rgba(99, 102, 241, .26);
}
.ico svg { width: 22px; height: 22px; }
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; letter-spacing: -.2px; }
.card p { font-size: 14px; color: var(--muted); line-height: 1.85; }

/* ============================================================
   深度展示（图文交替）
   ============================================================ */
.deep { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.deep.reverse .deep-text { order: 2; }
.deep.reverse .deep-visual { order: 1; }
.deep-text .lead { font-size: 15.5px; color: var(--muted); line-height: 1.95; margin-bottom: 26px; }

.ticks { display: flex; flex-direction: column; gap: 14px; }
.ticks li {
  position: relative; padding-left: 32px;
  font-size: 14.5px; color: #c8cddd; line-height: 1.7;
}
.ticks li::before {
  content: ''; position: absolute; left: 0; top: 5px;
  width: 18px; height: 18px; border-radius: 50%;
  background: rgba(99, 102, 241, .18) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23818cf8' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center / 11px no-repeat;
  border: 1px solid rgba(99, 102, 241, .3);
}

/* ===== 面板（时间线 / 代码 / 文档） ===== */
.panel {
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #12141b, #0d1015);
  border: 1px solid var(--border);
  box-shadow: 0 40px 80px -44px rgba(0, 0, 0, .95), 0 0 0 1px rgba(255,255,255,.03);
  overflow: hidden;
}
.panel-head {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 18px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  font-size: 12.5px; color: var(--muted);
  background: rgba(255,255,255,.025);
}
.panel-tag {
  margin-left: auto; font-size: 10.5px; font-weight: 700;
  color: var(--muted-2); background: rgba(255,255,255,.06);
  padding: 2px 9px; border-radius: 999px;
}
.panel-tag.live { color: var(--ok); background: rgba(52, 211, 153, .14); }
.panel-dots { display: flex; gap: 6px; }
.panel-dots i { width: 10px; height: 10px; border-radius: 50%; display: block; }
.panel-dots i.r { background: #ff5f57; } .panel-dots i.y { background: #febc2e; } .panel-dots i.g { background: #28c840; }
.panel-file { font-family: 'SF Mono', ui-monospace, Menlo, monospace; font-size: 12px; }

/* 时间线 */
.timeline { padding: 24px 22px; display: flex; flex-direction: column; gap: 4px; }
.tl { position: relative; padding: 0 0 22px 30px; }
.tl:last-child { padding-bottom: 0; }
.tl::before {
  content: ''; position: absolute; left: 6px; top: 16px; bottom: 0;
  width: 1px; background: rgba(255,255,255,.12);
}
.tl:last-child::before { display: none; }
.tl-dot {
  position: absolute; left: 0; top: 5px;
  width: 13px; height: 13px; border-radius: 50%;
  background: #22262f; border: 2px solid rgba(255,255,255,.18);
}
.tl.done .tl-dot { background: var(--ok); border-color: rgba(52,211,153,.5); }
.tl.active .tl-dot { background: var(--brand); border-color: rgba(99,102,241,.6); box-shadow: 0 0 0 4px rgba(99,102,241,.18); }
.tl-title { font-size: 13.5px; font-weight: 700; color: #e9ecf5; }
.tl-desc { font-size: 12.5px; color: var(--muted-2); margin-top: 2px; }
.bar { height: 4px; border-radius: 3px; background: rgba(255,255,255,.09); margin-top: 10px; overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: 3px; background: var(--grad); }

/* 代码面板 */
.editor { padding: 16px 0 14px; font-family: 'SF Mono', ui-monospace, Menlo, Consolas, monospace; font-size: 12.5px; }
.ln { display: flex; padding: 2px 18px; }
.ln.hl { background: rgba(99, 102, 241, .11); border-left: 2px solid var(--brand); padding-left: 16px; }
.ln .n { flex: 0 0 24px; color: #474d5f; user-select: none; }
.code-line { color: #c6cbdc; }
.k { color: #c084fc; } .f { color: #67e8f9; } .t { color: #5eead4; } .cm { color: #545b6e; font-style: italic; }
.term-mini {
  border-top: 1px solid rgba(255,255,255,.07);
  background: #0a0c11; padding: 12px 18px;
  font-family: 'SF Mono', ui-monospace, Menlo, monospace; font-size: 12px; line-height: 1.85;
}
.tm-line { color: #b9bfd0; }
.tm-p { color: #6b7385; margin-right: 7px; }
.tm-ok { color: var(--ok); }

/* 文档面板 */
.doc { padding: 26px 28px 30px; }
.doc-title { font-size: 16px; font-weight: 800; color: #eef1f8; letter-spacing: -.3px; }
.doc-meta { font-size: 11.5px; color: var(--muted-2); margin: 6px 0 20px; }
.doc-line { height: 8px; border-radius: 4px; background: rgba(255,255,255,.075); margin-bottom: 11px; }
.w96 { width: 96%; } .w90 { width: 90%; } .w84 { width: 84%; } .w78 { width: 78%; } .w70 { width: 70%; }
.doc-sub { height: 9px; width: 34%; border-radius: 4px; background: rgba(99,102,241,.42); margin: 20px 0 14px; }
.doc-chart {
  display: flex; align-items: flex-end; gap: 9px; height: 84px;
  margin-top: 20px; padding-top: 14px;
  border-top: 1px dashed rgba(255,255,255,.12);
}
.doc-chart i {
  flex: 1; border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, rgba(99,102,241,.95), rgba(168,85,247,.35));
}
.formats { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 4px; }
.fmt {
  font-size: 12.5px; font-weight: 600; color: #c3c9dc;
  background: rgba(255,255,255,.055); border: 1px solid var(--border);
  padding: 6px 15px; border-radius: 9px;
}

/* ===== 可协作三栏 ===== */
.triple { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.trio {
  padding: 32px 28px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.018));
  border: 1px solid var(--border);
  transition: transform .25s, border-color .25s;
}
.trio:hover { transform: translateY(-5px); border-color: rgba(168, 85, 247, .4); }
.trio-num {
  display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 1.4px;
  color: #c4b5fd; background: rgba(168, 85, 247, .16);
  border: 1px solid rgba(168, 85, 247, .3);
  padding: 3px 11px; border-radius: 8px; margin-bottom: 18px;
}
.trio h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.trio p { font-size: 14px; color: var(--muted); line-height: 1.85; }

/* ===== 三步 ===== */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step {
  position: relative; padding: 32px 28px 30px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.018));
  border: 1px solid var(--border);
}
.step-index {
  display: inline-grid; place-items: center; vertical-align: middle;
  width: 40px; height: 40px; margin: 0 10px 20px 0;
  border-radius: 12px; font-size: 17px; font-weight: 800; color: #fff;
  background: var(--grad);
  box-shadow: 0 10px 24px -10px rgba(99, 102, 241, 1);
}
.step-tag {
  display: inline-block; vertical-align: middle;
  margin-bottom: 20px;
  font-size: 11px; font-weight: 800; letter-spacing: 1.3px;
  color: #d8ccff; background: rgba(168, 85, 247, .15);
  border: 1px solid rgba(168, 85, 247, .3);
  padding: 4px 10px; border-radius: 7px;
}
.step h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.step p { font-size: 14px; color: var(--muted); line-height: 1.85; }
@media (min-width: 901px) {
  .step:not(:last-child)::after {
    content: ''; position: absolute; top: 51px; right: -13px;
    width: 8px; height: 8px; border-top: 2px solid rgba(99,102,241,.5); border-right: 2px solid rgba(99,102,241,.5);
    transform: rotate(45deg);
  }
}

/* ===== 使用场景 ===== */
.scenes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.scene {
  padding: 26px 24px; border-radius: 14px;
  background: rgba(255, 255, 255, .028);
  border: 1px solid var(--border);
  border-left: 2px solid rgba(99, 102, 241, .55);
  transition: transform .22s, background .22s, border-left-color .22s;
}
.scene:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, .05);
  border-left-color: var(--brand-2);
}
.scene h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.scene p { font-size: 13.5px; color: var(--muted-2); line-height: 1.8; }

/* ============================================================
   下载板块
   ============================================================ */
.dl-sec { background: var(--bg-2); }
.btn-ico { width: 17px; height: 17px; margin-left: 9px; }

.dl { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 940px; margin: 0 auto; }
.dl-card {
  padding: 30px 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  transition: border-color .25s, transform .25s;
}
.dl-card:hover { border-color: rgba(99, 102, 241, .38); transform: translateY(-3px); }

.dl-os { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.dl-os-ico { width: 32px; height: 32px; color: #c7ccf5; }
.dl-os-text strong { display: block; font-size: 18px; font-weight: 700; letter-spacing: -.3px; }
.dl-os-text span { display: block; font-size: 13px; color: var(--muted-2); margin-top: 1px; }

.dl-btn {
  width: 100%; justify-content: space-between; gap: 12px;
  padding: 13px 20px; font-size: 14.5px; margin-bottom: 10px;
}
.dl-size {
  font-size: 12.5px; font-weight: 600; color: rgba(255,255,255,.72);
  background: rgba(255,255,255,.14); padding: 2px 9px; border-radius: 6px;
}
.btn-ghost .dl-size { color: var(--muted-2); background: rgba(255,255,255,.06); }
.dl-hint { font-size: 12.5px; color: var(--muted-2); line-height: 1.7; margin-top: 4px; }

.dl-notes {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  max-width: 940px; margin: 42px auto 0;
  padding-top: 34px; border-top: 1px solid var(--border);
}
.dl-note-item strong {
  display: block; font-size: 14px; font-weight: 700; color: #dbe0ee; margin-bottom: 8px;
}
.dl-note-item p { font-size: 13px; color: var(--muted-2); line-height: 1.85; }

/* ===== FAQ ===== */
.faq { border-top: 1px solid var(--border); }
.faq dt {
  font-size: 16px; font-weight: 700; color: var(--text);
  padding: 24px 0 10px; border-top: 1px solid transparent;
}
.faq dt:first-child { padding-top: 6px; }
.faq dd { font-size: 14.5px; color: var(--muted); line-height: 1.95; padding-bottom: 22px; border-bottom: 1px solid var(--border); }
.faq dd:last-child { border-bottom: none; }

/* ===== 关于 / 联系 ===== */
.para { font-size: 15.5px; color: var(--muted); line-height: 2.05; margin-bottom: 20px; }
.para strong { color: var(--text); font-weight: 600; }

.contact-card {
  margin-top: 44px; padding: 34px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border: 1px solid var(--border);
}
.contact-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 20px; }
.contact-list li {
  display: flex; gap: 18px; align-items: baseline;
  padding: 15px 0; border-bottom: 1px solid rgba(255,255,255,.06);
}
.contact-list li:last-child { border-bottom: none; }
.contact-label { flex: 0 0 86px; font-size: 13.5px; color: var(--muted-2); }
.contact-value { font-size: 14.5px; color: #dfe3ee; word-break: break-all; }
.contact-value a { color: #a5b4fc; }
.contact-value a:hover { text-decoration: underline; }
.contact-note { margin-top: 18px; font-size: 13.5px; color: var(--muted-2); }

/* ===== 页脚 ===== */
.footer {
  padding: 56px 0 48px; text-align: center;
  border-top: 1px solid rgba(255,255,255,.07);
  background: #06070a;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; }
.footer-brand {
  display: flex; align-items: center; gap: 9px;
  font-size: 17px; font-weight: 800; color: #eef1f8; margin-bottom: 10px;
}
.footer-desc { font-size: 13.5px; color: var(--muted-2); margin-bottom: 22px; }
.footer-meta { font-size: 13px; color: var(--muted-2); line-height: 2; }
.footer-meta a { color: var(--muted); transition: color .18s; }
.footer-meta a:hover { color: #c3c9dc; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 980px) {
  .dl, .dl-notes { grid-template-columns: 1fr; }
  .dl { max-width: 520px; }
  .deep { grid-template-columns: 1fr; gap: 40px; }
  .deep.reverse .deep-text { order: 1; }
  .deep.reverse .deep-visual { order: 2; }
  .h2.left { text-align: left; }
  .grid, .triple, .steps, .scenes { grid-template-columns: repeat(2, 1fr); }
  .strip-inner { grid-template-columns: repeat(2, 1fr); gap: 26px; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-inner { justify-content: space-between; }
  .hero { padding: 64px 0 0; }
  .hero h1 { letter-spacing: -1px; }
  .hero-sub { font-size: 15.5px; }
  .hero-actions { margin-bottom: 48px; }
  .btn-lg { padding: 13px 26px; font-size: 14.5px; }
  .section { padding: 66px 0; }
  .head { margin-bottom: 40px; }
  .sub { font-size: 14.5px; }

  .grid, .triple, .steps, .scenes { grid-template-columns: 1fr; }
  .card, .trio, .step, .scene { padding: 24px 20px; }

  .app-list { display: none; }
  .app-rail { flex: 0 0 46px; }
  .app-main { padding: 18px 16px; }
  .app-body { min-height: 320px; }
  .plan-step { font-size: 12px; }

  .contact-card { padding: 26px 20px; }
  .contact-list li { flex-direction: column; gap: 4px; }
  .contact-label { flex: none; }
  .doc { padding: 20px 18px 24px; }
}

/* 尊重用户的动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js-ready .reveal { opacity: 1; transform: none; transition: none; }
  .typing i { animation: none; }
}