/* ============================================================
   友点 TV 快传 / YD TVDrop 官网设计系统 v2
   深色杂志风：大字排版 · 玻璃卡片 · 橙色行动色 · 纹理背景
   ============================================================ */
:root {
  --bg: #07080D;
  --bg-2: #0B0D15;
  --surface: rgba(255, 255, 255, .045);
  --surface-2: rgba(255, 255, 255, .07);
  --line: rgba(255, 255, 255, .09);
  --line-2: rgba(255, 255, 255, .14);
  --text: #F2F5FA;
  --muted: #9BA6BC;
  --primary: #8FB8FF;          /* 电视蓝：次级强调 */
  --accent: #FF7A2F;           /* 行动橙：主 CTA / 关键强调 */
  --accent-2: #FFB25C;
  --teal: #7DE3C8;
  --green: #4ADE80;
  --green-soft: #BBF7D0;
  --warn: #FBBF24;
  --warn-soft: #FDE68A;
  --red: #FF7B72;
  --radius: 20px;
  --maxw: 1100px;
  --serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
/* 纹理层：细网格 + 顶部光斑 + 噪点（全 CSS，零图片） */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(900px 480px at 78% -6%, rgba(143, 184, 255, .09), transparent 65%),
    radial-gradient(700px 420px at 8% 12%, rgba(255, 122, 47, .06), transparent 65%);
}
body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    repeating-linear-gradient(0deg, transparent 0 47px, rgba(255, 255, 255, .025) 47px 48px),
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(255, 255, 255, .025) 47px 48px);
  mask-image: radial-gradient(1200px 700px at 50% 0%, #000 30%, transparent 90%);
  -webkit-mask-image: radial-gradient(1200px 700px at 50% 0%, #000 30%, transparent 90%);
}
a { color: var(--primary); text-decoration: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ===== 导航：玻璃浮层 ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 8, 13, .72);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 20px; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; letter-spacing: .2px; color: var(--text); }
.logo-badge {
  width: 34px; height: 34px; display: block; border-radius: 8px;
  filter: drop-shadow(0 3px 10px rgba(46, 123, 232, .38));
}
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--muted); font-size: 14px; font-weight: 550; transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: linear-gradient(135deg, #FF8A3D, #FF6B2C); color: #180B02 !important;
  font-weight: 800; padding: 8px 18px; border-radius: 11px; font-size: 14px !important;
  box-shadow: 0 4px 18px rgba(255, 122, 47, .30);
  transition: transform .15s ease, box-shadow .15s ease;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 26px rgba(255, 122, 47, .45); }
.lang-switch { color: var(--muted) !important; font-size: 13px !important; border: 1px solid var(--line); padding: 5px 10px; border-radius: 8px; }
.lang-switch:hover { color: var(--text) !important; border-color: var(--line-2); }
@media (max-width: 720px) { .nav-links a:not(.nav-cta):not(.lang-switch) { display: none; } }

/* ===== Hero：杂志大字 ===== */
.hero { padding: 88px 0 56px; position: relative; overflow: hidden; }
.hero-mark {
  position: absolute; left: 50%; bottom: -4%; transform: translateX(-50%);
  font-family: var(--serif); font-style: italic; font-weight: 700;
  font-size: clamp(90px, 16vw, 190px); letter-spacing: 2px; white-space: nowrap;
  color: transparent; -webkit-text-stroke: 1px rgba(255, 255, 255, .05);
  user-select: none; pointer-events: none; z-index: 0;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; position: relative; z-index: 1; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .hero { padding-top: 52px; } .hero-mark { display: none; } }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(74, 222, 128, .09); border: 1px solid rgba(74, 222, 128, .25);
  color: var(--green-soft); font-size: 12.5px; font-weight: 650;
  padding: 6px 14px; border-radius: 999px; margin-bottom: 24px;
  font-family: var(--mono); letter-spacing: .3px;
}
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: breathe 2.2s infinite; }
@keyframes breathe { 0%,100% { opacity: .4 } 50% { opacity: 1 } }
h1 {
  font-size: clamp(36px, 5.6vw, 62px); line-height: 1.14; font-weight: 900;
  letter-spacing: -1.2px;
}
h1 .hl {
  position: relative; white-space: nowrap;
  background: linear-gradient(180deg, transparent 64%, rgba(255, 122, 47, .5) 64%);
  padding: 0 4px; border-radius: 4px;
}
.hero-sub { color: var(--muted); font-size: clamp(15px, 1.6vw, 17.5px); margin: 24px 0 30px; max-width: 560px; }
.cta-row { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, #FF8F47, #FF6B2C); color: #1A0C02;
  font-weight: 850; font-size: 16.5px; padding: 15px 30px; border-radius: 15px;
  box-shadow: 0 10px 34px rgba(255, 122, 47, .38), inset 0 1px 0 rgba(255, 255, 255, .35);
  transition: transform .16s ease, box-shadow .16s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 46px rgba(255, 122, 47, .52), inset 0 1px 0 rgba(255,255,255,.35); }
.btn-ghost { color: var(--muted); font-size: 15px; font-weight: 600; padding: 12px 4px; border-bottom: 1px dashed rgba(155, 166, 188, .45); }
.btn-ghost:hover { color: var(--text); border-color: var(--text); }
.hero-chips { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 28px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; color: var(--muted);
  background: var(--surface); border: 1px solid var(--line);
  padding: 8px 15px; border-radius: 999px;
  backdrop-filter: blur(8px);
}
.hero-note { font-size: 12.5px; color: rgba(155, 166, 188, .66); margin-top: 16px; font-family: var(--mono); }

/* ===== 跑马灯 ===== */
.marquee {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .02);
  overflow: hidden; padding: 15px 0; position: relative;
}
.marquee-track { display: flex; gap: 48px; width: max-content; animation: slide 26s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  font-family: var(--mono); font-size: 13.5px; letter-spacing: 1.5px;
  color: rgba(155, 166, 188, .85); white-space: nowrap; text-transform: uppercase;
}
.marquee-track span b { color: var(--accent); font-weight: 700; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ===== TV 演示机 ===== */
.tv { position: relative; }
.tv-frame {
  background: linear-gradient(165deg, #232C46, #10152A 60%);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 24px; padding: 15px 15px 28px;
  box-shadow:
    0 34px 90px rgba(0, 0, 0, .6),
    0 24px 70px rgba(143, 184, 255, .10),
    inset 0 1px 0 rgba(255, 255, 255, .08);
}
.tv-screen {
  background: radial-gradient(130% 130% at 72% 8%, #17233F 0%, #0C111F 72%);
  border-radius: 13px; padding: 22px; min-height: 300px;
  display: flex; gap: 18px; align-items: center; position: relative; overflow: hidden;
}
.tv-screen::after {  /* 玻璃反光 */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(118deg, rgba(255, 255, 255, .07) 0%, transparent 28%, transparent 70%, rgba(255, 255, 255, .035) 100%);
}
.tv-stand { width: 90px; height: 10px; background: #1A2340; margin: 7px auto 0; border-radius: 4px; }
.tv-base { width: 170px; height: 8px; background: #131A2E; margin: 0 auto; border-radius: 6px; }
.qr-card {
  background: #fff; border-radius: 15px; padding: 12px; flex-shrink: 0;
  animation: qrglow 3.6s ease-in-out infinite;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .4);
}
@keyframes qrglow { 0%,100% { box-shadow: 0 0 22px rgba(143,184,255,.20) } 50% { box-shadow: 0 0 46px rgba(143,184,255,.42) } }
.tv-info { flex: 1; min-width: 0; }
.tv-status { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--green-soft); font-weight: 650; }
.tv-status .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: breathe 2s infinite; }
.tv-addr { font-family: var(--mono); font-size: 15px; color: var(--primary); margin-top: 8px; }
.tv-code-label { font-size: 11.5px; color: rgba(155, 166, 188, .8); margin-top: 12px; }
.tv-code { font-size: 26px; font-weight: 800; letter-spacing: 6px; color: var(--warn-soft); font-family: var(--mono); }
.tv-task {
  margin-top: 14px; background: rgba(255, 255, 255, .05); border-radius: 11px; padding: 11px 13px;
  border: 1px solid rgba(255, 255, 255, .08);
}
.tv-task .name { font-size: 12.5px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tv-task .bar { height: 6px; border-radius: 3px; background: rgba(255, 255, 255, .12); margin-top: 8px; overflow: hidden; }
.tv-task .bar i { display: block; height: 100%; width: 68%; border-radius: 3px; background: linear-gradient(90deg, #FF8A3D, #7DE3C8); animation: load 2.6s ease-in-out infinite alternate; }
@keyframes load { from { width: 42% } to { width: 88% } }
.tv-task .meta { font-size: 11px; color: var(--muted); margin-top: 6px; font-family: var(--mono); }
.float-tag {
  position: absolute; z-index: 3;
  background: rgba(18, 22, 36, .88); backdrop-filter: blur(10px);
  border: 1px solid var(--line-2); border-radius: 13px; padding: 9px 15px;
  font-size: 12.5px; color: var(--text);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .45);
  animation: floaty 4.2s ease-in-out infinite;
}
.float-tag b { color: var(--accent-2); }
.ft-1 { top: -16px; right: -8px; transform: rotate(2deg); }
.ft-2 { bottom: 34px; left: -20px; transform: rotate(-2deg); animation-delay: 1.3s; }
@keyframes floaty { 0%,100% { translateY(0) } 50% { translateY(-8px) } }
@media (max-width: 900px) { .tv { max-width: 480px; margin: 0 auto; } .ft-2 { left: 0; } }

/* ===== Section 体系：编号 + 大标题 ===== */
section { padding: 96px 0; position: relative; }
@media (max-width: 720px) { section { padding: 64px 0; } }
.sec-eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--mono); font-size: 12.5px; font-weight: 700; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--accent); margin-bottom: 16px;
}
.sec-eyebrow::before { content: ""; width: 34px; height: 1.5px; background: var(--accent); opacity: .8; }
h2 { font-size: clamp(27px, 3.8vw, 42px); font-weight: 880; line-height: 1.22; letter-spacing: -.8px; }
.sec-sub { color: var(--muted); margin-top: 16px; font-size: 16.5px; max-width: 640px; }

/* ===== 玻璃卡片基座 ===== */
.pain, .feat, .scene, .trust, .step, .dl-card, .ba, .stepv {
  background: linear-gradient(180deg, rgba(255, 255, 255, .055), rgba(255, 255, 255, .028));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
}

/* ===== 痛点卡 ===== */
.pain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; margin-top: 46px; }
.pain { padding: 26px; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.pain:hover {
  transform: translateY(-6px) rotate(-.5deg);
  border-color: rgba(255, 122, 47, .4);
  box-shadow: 0 20px 44px rgba(0, 0, 0, .35), inset 0 1px 0 rgba(255, 255, 255, .06);
}
.pain:nth-child(even):hover { transform: translateY(-6px) rotate(.5deg); }
.pain h3 { font-size: 17px; font-weight: 760; margin: 14px 0 8px; line-height: 1.5; }
.pain p { font-size: 14px; color: var(--muted); }

/* ===== 三步流程 ===== */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; }
@media (max-width: 780px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 28px; position: relative; overflow: hidden; }
.step::after {  /* 角标序号水印 */
  content: attr(data-n); position: absolute; right: 14px; top: 2px;
  font-family: var(--serif); font-style: italic; font-weight: 700;
  font-size: 84px; color: rgba(255, 255, 255, .05); line-height: 1;
}
.step .num {
  width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center;
  background: rgba(255, 122, 47, .14); color: var(--accent-2); font-weight: 850; font-size: 15px;
  margin-bottom: 16px; font-family: var(--mono);
}
.step h3 { font-size: 17.5px; font-weight: 760; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--muted); }
.step .foot { font-size: 12.5px; color: var(--teal); margin-top: 14px; font-weight: 650; }

/* ===== Before / After ===== */
.ba-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 48px; }
@media (max-width: 780px) { .ba-grid { grid-template-columns: 1fr; } }
.ba { border-radius: var(--radius); padding: 30px; }
.ba.before { border-color: rgba(255, 123, 114, .22); }
.ba.after {
  border-color: rgba(255, 122, 47, .45);
  background: linear-gradient(180deg, rgba(255, 122, 47, .085), rgba(255, 122, 47, .03));
  box-shadow: 0 22px 54px rgba(255, 122, 47, .10), inset 0 1px 0 rgba(255, 255, 255, .07);
}
.ba .tag {
  display: inline-block; font-family: var(--mono); font-size: 11.5px; font-weight: 800;
  letter-spacing: 2px; padding: 5px 13px; border-radius: 999px; margin-bottom: 18px;
}
.ba.before .tag { color: var(--red); background: rgba(255, 123, 114, .1); border: 1px solid rgba(255, 123, 114, .3); }
.ba.after .tag { color: #FFD9BC; background: rgba(255, 122, 47, .16); border: 1px solid rgba(255, 122, 47, .4); }
.ba ol { list-style: none; }
.ba ol li {
  font-size: 14.5px; padding: 10px 0 10px 40px; position: relative;
  border-bottom: 1px dashed rgba(155, 166, 188, .16);
}
.ba ol li:last-child { border-bottom: none; }
.ba ol li::before {
  content: counter(s); counter-increment: s; position: absolute; left: 0; top: 10px;
  width: 26px; height: 26px; border-radius: 9px; display: grid; place-items: center;
  font-size: 12px; font-weight: 850; font-family: var(--mono);
}
.ba ol { counter-reset: s; }
.ba ol li { counter-increment: s; }
.ba.before ol li::before { background: rgba(255, 123, 114, .12); color: var(--red); }
.ba.after ol li::before { background: rgba(255, 122, 47, .16); color: var(--accent-2); }
.ba .stat { margin-top: 18px; font-size: 13.5px; font-weight: 800; font-family: var(--mono); }
.ba.before .stat { color: var(--red); }
.ba.after .stat { color: var(--accent-2); }

/* ===== 功能 ===== */
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; margin-top: 48px; }
.feat { padding: 28px; transition: transform .2s, border-color .2s, box-shadow .2s; }
.feat:hover { transform: translateY(-5px); border-color: rgba(143, 184, 255, .38); box-shadow: 0 18px 44px rgba(0, 0, 0, .32); }
.feat .q { font-size: 15.5px; font-weight: 760; display: flex; gap: 11px; align-items: baseline; }
.feat .a { font-size: 14px; color: var(--muted); margin-top: 11px; }
.feat .r {
  font-size: 13.5px; color: var(--accent-2); margin-top: 14px; font-weight: 700;
  padding-top: 14px; border-top: 1px dashed rgba(255, 122, 47, .25);
}

/* ===== 场景 ===== */
.scene-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 48px; }
.scene { padding: 26px; transition: transform .2s, border-color .2s; }
.scene:hover { transform: translateY(-4px); border-color: rgba(125, 227, 200, .32); }
.scene .who { font-size: 14px; font-weight: 800; color: var(--teal); display: flex; align-items: center; gap: 9px; }
.scene p { font-size: 13.5px; color: var(--muted); margin-top: 11px; }
.scene .quote {
  font-size: 13px; color: var(--text);
  background: rgba(255, 122, 47, .07); border-left: 3px solid var(--accent);
  padding: 9px 13px; border-radius: 0 10px 10px 0; margin-top: 13px;
}

/* ===== 对比表 ===== */
.cmp-wrap {
  overflow-x: auto; margin-top: 48px; border-radius: var(--radius);
  border: 1px solid var(--line); background: rgba(255, 255, 255, .025);
  backdrop-filter: blur(10px);
}
.cmp { width: 100%; border-collapse: collapse; min-width: 700px; }
.cmp th, .cmp td { padding: 15px 20px; text-align: left; font-size: 14px; border-bottom: 1px solid rgba(255, 255, 255, .06); }
.cmp thead th { font-family: var(--mono); font-size: 12px; color: var(--muted); font-weight: 700; letter-spacing: 1px; text-transform: uppercase; background: rgba(255, 255, 255, .03); }
.cmp .col-us {
  background: rgba(255, 122, 47, .075); color: var(--text); font-weight: 640;
  box-shadow: inset 1.5px 0 0 rgba(255, 122, 47, .35), inset -1.5px 0 0 rgba(255, 122, 47, .35);
}
.cmp thead .col-us { color: var(--accent-2); font-weight: 850; }
.cmp td:not(.col-us) { color: var(--muted); }
.yes { color: var(--green) !important; font-weight: 700; }
.no { color: var(--red) !important; }
.mid { color: var(--warn) !important; }

/* ===== 信任 ===== */
.trust-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 48px; }
.trust { padding: 26px; }
.trust h3 { font-size: 15.5px; font-weight: 760; margin: 12px 0 7px; }
.trust p { font-size: 13.5px; color: var(--muted); }

/* ===== FAQ ===== */
.faq-list { margin-top: 44px; }
details {
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .026));
  border: 1px solid var(--line); border-radius: 16px;
  padding: 19px 24px; margin-bottom: 13px;
  backdrop-filter: blur(10px);
  transition: border-color .2s;
}
details[open] { border-color: rgba(255, 122, 47, .35); }
summary { cursor: pointer; font-weight: 720; font-size: 15.5px; list-style: none; display: flex; align-items: center; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::before {
  content: "+"; color: var(--accent); font-weight: 850; font-size: 19px;
  width: 22px; transition: transform .25s ease; display: inline-block;
}
details[open] summary::before { transform: rotate(45deg); }
details .ans { margin-top: 13px; padding-left: 34px; color: var(--muted); font-size: 14.5px; }
details .ans b, details .ans strong { color: var(--text); }

/* ===== 底部 CTA / Footer ===== */
.final { text-align: center; padding: 110px 28px 90px; position: relative; overflow: hidden; }
.final::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(560px 260px at 50% 66%, rgba(255, 122, 47, .13), transparent 70%),
    radial-gradient(400px 200px at 50% 90%, rgba(143, 184, 255, .07), transparent 70%);
}
.final > * { position: relative; z-index: 1; }
.final h2 { font-size: clamp(30px, 4.4vw, 48px); }
.final p { color: var(--muted); margin: 16px 0 34px; font-size: 16px; }
footer { border-top: 1px solid var(--line); padding: 38px 0 46px; color: var(--muted); font-size: 13px; }
.foot-grid { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.foot-grid a { color: var(--muted); }
.foot-grid a:hover { color: var(--text); }
.foot-meta { margin-top: 15px; font-size: 12px; color: rgba(155, 166, 188, .55); font-family: var(--mono); }

/* 彩蛋 */
.egg { font-size: 12px; color: rgba(155, 166, 188, .4); user-select: none; cursor: default; }
.egg:hover { color: var(--accent-2); }

/* ===== 下载页 ===== */
.dl-card { padding: 34px; margin-top: 38px; }
.dl-card h2 { font-size: 24px; }
.dl-meta { display: flex; gap: 10px; flex-wrap: wrap; margin: 18px 0 28px; }
.kv {
  font-family: var(--mono); font-size: 12px; color: var(--muted);
  background: rgba(255, 255, 255, .04); border: 1px solid var(--line);
  padding: 6px 13px; border-radius: 9px;
}
.sha {
  font-family: var(--mono); font-size: 12px; color: var(--muted); word-break: break-all;
  background: rgba(255, 255, 255, .03); padding: 11px 15px; border-radius: 11px;
  margin-top: 20px; border: 1px dashed var(--line-2);
}
.steps-v { margin-top: 38px; display: grid; gap: 15px; }
.stepv { display: flex; gap: 18px; padding: 22px 24px; }
.stepv .n {
  flex-shrink: 0; width: 34px; height: 34px; border-radius: 11px;
  display: grid; place-items: center;
  background: rgba(255, 122, 47, .13); color: var(--accent-2); font-weight: 850;
}
.stepv h3 { font-size: 15.5px; font-weight: 760; }
.stepv p { font-size: 13.5px; color: var(--muted); margin-top: 5px; }

/* ===== 滚动渐入（JS 注入 .rv） ===== */
.rv { opacity: 0; transform: translateY(28px); }
.rv.on { opacity: 1; transform: none; transition: opacity .7s cubic-bezier(.2, .7, .2, 1), transform .7s cubic-bezier(.2, .7, .2, 1); }

/* ===== 线条图标体系 ===== */
.ic {
  width: 22px; height: 22px; flex-shrink: 0;
  stroke: currentColor; fill: none;
  stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round;
  vertical-align: -4px;
}
.ico {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center; flex-shrink: 0;
  background: rgba(255, 255, 255, .07); color: var(--primary);
  border: 1px solid rgba(255, 255, 255, .08);
}
.ico .ic { width: 25px; height: 25px; }
.ico.teal { color: var(--teal); }
.ico.warn { color: var(--warn); }
.ico.red { color: var(--red); }
.pain .ico { margin-bottom: 6px; }
.feat .q .ic { width: 20px; height: 20px; vertical-align: -3px; color: var(--primary); }
.scene .who .ic { width: 17px; height: 17px; vertical-align: -3px; }
.trust .ico { margin-bottom: 8px; }
.kv .ic { width: 14px; height: 14px; vertical-align: -2.5px; color: var(--teal); }
.chip .ic { width: 15px; height: 15px; vertical-align: -2.5px; color: var(--accent-2); }
.stepv .n .ic { width: 17px; height: 17px; color: var(--accent-2); }
.btn-primary .ic { width: 18px; height: 18px; vertical-align: -3px; }
.float-tag .ic { width: 15px; height: 15px; vertical-align: -2.5px; color: var(--teal); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .rv { opacity: 1; transform: none; }
}

/* ===== emoji 内容图标（痛点/信任卡） ===== */
.ico.em {
  font-size: 25px; line-height: 1;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
}
.pain:nth-child(6n+1) .ico.em { background: linear-gradient(145deg, rgba(255,122,47,.20), rgba(255,122,47,.06)); }
.pain:nth-child(6n+2) .ico.em { background: linear-gradient(145deg, rgba(125,227,200,.18), rgba(125,227,200,.05)); }
.pain:nth-child(6n+3) .ico.em { background: linear-gradient(145deg, rgba(143,184,255,.20), rgba(143,184,255,.06)); }
.pain:nth-child(6n+4) .ico.em { background: linear-gradient(145deg, rgba(255,123,114,.20), rgba(255,123,114,.06)); }
.pain:nth-child(6n+5) .ico.em { background: linear-gradient(145deg, rgba(186,148,255,.20), rgba(186,148,255,.06)); }
.pain:nth-child(6n+6) .ico.em { background: linear-gradient(145deg, rgba(255,196,84,.20), rgba(255,196,84,.06)); }
.trust:nth-child(4n+2) .ico.em { background: linear-gradient(145deg, rgba(125,227,200,.18), rgba(125,227,200,.05)); }
.trust:nth-child(4n+3) .ico.em { background: linear-gradient(145deg, rgba(255,123,114,.18), rgba(255,123,114,.05)); }
.trust:nth-child(4n+4) .ico.em { background: linear-gradient(145deg, rgba(255,196,84,.18), rgba(255,196,84,.05)); }
.feat .q .emo {
  display: inline-block; font-size: 21px; line-height: 1; margin-right: 3px; vertical-align: -3px;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
}
.scene .who { font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", var(--sans, sans-serif); }

/* ===== 导航语言下拉 ===== */
.lang-menu { position: relative; }
.lang-menu summary {
  list-style: none; cursor: pointer; color: var(--muted); font-size: 13px; font-weight: 600;
  border: 1px solid var(--line); padding: 5px 10px; border-radius: 8px; user-select: none;
}
.lang-menu summary::-webkit-details-marker { display: none; }
.lang-menu summary:hover { color: var(--text); border-color: var(--line-2); }
.lang-menu[open] summary { color: var(--text); border-color: var(--line-2); }
.lang-list {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 60;
  display: grid; gap: 2px; padding: 8px; min-width: 150px;
  background: rgba(13, 16, 24, .92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--line-2); border-radius: 14px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .5);
}
.lang-list a { color: var(--muted); font-size: 13px; padding: 6px 10px; border-radius: 8px; white-space: nowrap; }
.lang-list a:hover { color: var(--text); background: rgba(255, 255, 255, .06); }
.lang-list a.on { color: var(--accent); font-weight: 700; }