/* ============================================================
   大橘督学 · App 展示网站
   主色：大橘 #F9A825 ｜ 模块色：学习黄 / 任务蓝 #42A5F5 / 动态粉 #EC407A / 我的绿 #66BB6A
   ============================================================ */
:root {
  --orange: #F9A825;
  --orange-bright: #FBC02D;
  --orange-deep: #E08E00;
  --blue: #42A5F5;
  --pink: #EC407A;
  --green: #66BB6A;
  --ink: #26221C;
  --ink-2: #6B6459;
  --ink-3: #9B948A;
  --paper: #FFFDF7;
  --cream: #FFF6E3;
  --card: #FFFFFF;
  --line: #F0E9DC;
  --dark: #221B12;
  --radius: 22px;
  --shadow-sm: 0 2px 10px rgba(120, 90, 30, .07);
  --shadow-md: 0 10px 34px rgba(120, 90, 30, .12);
  --shadow-lg: 0 24px 60px rgba(120, 90, 30, .18);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

::selection { background: var(--orange); color: #fff; }

.container { width: min(1180px, 92%); margin: 0 auto; }
section { position: relative; }

/* ---------- 通用小组件 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--cream); border: 1px solid #F5E3B8;
  color: var(--orange-deep); font-size: 14px; font-weight: 600;
  padding: 7px 16px; border-radius: 999px;
}
.sec-tag {
  display: inline-block; font-size: 14px; font-weight: 700;
  letter-spacing: 3px; color: var(--orange-deep);
  background: var(--cream); padding: 6px 18px; border-radius: 999px;
  margin-bottom: 18px;
}
.sec-title { font-size: clamp(28px, 4vw, 44px); font-weight: 800; line-height: 1.3; letter-spacing: .5px; }
.sec-sub { color: var(--ink-2); font-size: 17px; margin-top: 14px; max-width: 640px; }
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-head .sec-sub { margin-inline: auto; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700; border-radius: 999px;
  padding: 15px 34px; cursor: pointer; border: none;
  transition: transform .25s, box-shadow .25s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--orange-bright), var(--orange));
  color: #fff; box-shadow: 0 10px 26px rgba(249, 168, 37, .42);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(249, 168, 37, .5); }
.btn-ghost {
  background: #fff; color: var(--ink); border: 2px solid var(--line);
}
.btn-ghost:hover { border-color: var(--orange); color: var(--orange-deep); transform: translateY(-3px); }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s, box-shadow .3s;
  background: transparent;
}
.nav.scrolled {
  background: rgba(255, 253, 247, .88);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line), 0 8px 24px rgba(120, 90, 30, .06);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav-logo { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 20px; }
.nav-logo img {
  width: 42px; height: 42px; border-radius: 12px; object-fit: cover;
  box-shadow: 0 4px 12px rgba(249, 168, 37, .35);
}
.nav-links { display: flex; gap: 34px; font-size: 15px; font-weight: 600; color: var(--ink-2); }
.nav-links a { position: relative; padding: 6px 0; transition: color .2s; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 3px;
  background: var(--orange); border-radius: 3px; transition: width .25s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }
.nav-cta { padding: 10px 24px; font-size: 14px; }
.nav-toggle { display: none; background: none; border: none; font-size: 26px; cursor: pointer; color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  padding: 168px 0 90px;
  background:
    radial-gradient(720px 420px at 88% 6%, rgba(236, 64, 122, .10), transparent 62%),
    radial-gradient(820px 520px at 8% 18%, rgba(66, 165, 245, .10), transparent 60%),
    radial-gradient(900px 600px at 55% 108%, rgba(249, 168, 37, .16), transparent 64%),
    linear-gradient(180deg, #FFF9EC 0%, var(--paper) 78%);
  overflow: hidden;
}
.hero-grid {
  display: grid; grid-template-columns: 1.08fr .92fr;
  gap: 48px; align-items: center;
}
.hero h1 {
  font-size: clamp(38px, 5.4vw, 62px); font-weight: 900; line-height: 1.22;
  margin: 22px 0 18px; letter-spacing: 1px;
}
.hero h1 .hl {
  background: linear-gradient(transparent 62%, rgba(249, 168, 37, .45) 62%);
  padding: 0 4px;
}
.hero h1 .hl-pink { background: linear-gradient(transparent 62%, rgba(236, 64, 122, .32) 62%); padding: 0 4px; }
.hero-desc { font-size: 18px; color: var(--ink-2); max-width: 560px; }
.hero-desc b { color: var(--ink); }
.hero-actions { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }

.hero-stats {
  display: flex; gap: 40px; margin-top: 46px; flex-wrap: wrap;
}
.hstat .num {
  font-size: 30px; font-weight: 900; color: var(--orange-deep);
  font-variant-numeric: tabular-nums;
}
.hstat .num small { font-size: 16px; font-weight: 700; }
.hstat .lab { font-size: 13px; color: var(--ink-3); font-weight: 600; margin-top: 2px; }

/* Hero 右侧：手机 + 悬浮通知 + 猫 */
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone {
  width: 296px; border-radius: 44px; background: #17140F;
  padding: 10px; box-shadow: var(--shadow-lg);
  position: relative; z-index: 2;
}
.phone-screen { border-radius: 35px; overflow: hidden; position: relative; }
.phone-screen img { width: 100%; }
.phone-notch {
  position: absolute; top: 22px; left: 50%; transform: translateX(-50%);
  width: 96px; height: 24px; background: #17140F; border-radius: 999px; z-index: 3;
}
.float-notif {
  position: absolute; z-index: 4; left: -66px; top: 44%;
  width: 320px; border-radius: 20px; overflow: hidden;
  box-shadow: 0 22px 50px rgba(60, 45, 10, .3);
  border: 4px solid rgba(255, 255, 255, .55);
  transform: rotate(-4deg);
  animation: bob 5s ease-in-out infinite;
}
.float-cat {
  position: absolute; z-index: 5; right: -34px; bottom: -8px; width: 150px;
  filter: drop-shadow(0 16px 24px rgba(120, 90, 30, .28));
  animation: bob 6s ease-in-out infinite reverse;
}
.float-chip {
  position: absolute; z-index: 4; right: -20px; top: 8%;
  background: #fff; border-radius: 16px; padding: 10px 16px;
  box-shadow: var(--shadow-md); font-size: 13px; font-weight: 700;
  display: flex; align-items: center; gap: 8px;
  animation: bob 7s ease-in-out infinite;
}
.float-chip .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--green); }
@keyframes bob {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-12px) rotate(-4deg); }
}
.float-cat, .float-chip { animation-name: bob2; }
@keyframes bob2 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- 三个步骤 ---------- */
.how { padding: 90px 0 40px; }
.how-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.how-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px; position: relative; box-shadow: var(--shadow-sm);
  transition: transform .3s, box-shadow .3s;
}
.how-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.how-num {
  position: absolute; top: 24px; right: 28px; font-size: 52px; font-weight: 900;
  color: transparent; -webkit-text-stroke: 2px #F2E4C2;
}
.how-icon {
  width: 58px; height: 58px; border-radius: 18px; display: flex;
  align-items: center; justify-content: center; font-size: 28px; margin-bottom: 20px;
}
.how-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 10px; }
.how-card p { font-size: 15px; color: var(--ink-2); }

/* ---------- 四大模块 Tab 展示 ---------- */
.showcase { padding: 90px 0; }
.showcase-grid {
  display: grid; grid-template-columns: 480px 1fr; gap: 70px; align-items: center;
}
.showcase-phone { display: flex; justify-content: center; position: sticky; top: 110px; }
.showcase-phone .phone { width: 316px; }
.showcase-phone .phone-screen img { min-height: 560px; object-fit: cover; }

.mod-tabs { display: flex; flex-direction: column; gap: 16px; }
.mod-tab {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 24px 26px; cursor: pointer; transition: border-color .25s, transform .25s, box-shadow .25s;
  text-align: left; width: 100%; font: inherit;
}
.mod-tab:hover { transform: translateX(6px); }
.mod-tab.active { box-shadow: var(--shadow-md); transform: translateX(10px); }
.mod-tab .m-icon {
  flex: 0 0 54px; width: 54px; height: 54px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center; font-size: 26px;
}
.mod-tab h3 { font-size: 19px; font-weight: 800; display: flex; align-items: center; gap: 10px; }
.mod-tab h3 .en { font-size: 12px; font-weight: 700; letter-spacing: 1px; padding: 2px 10px; border-radius: 999px; }
.mod-tab p { font-size: 14.5px; color: var(--ink-2); margin-top: 6px; }
.mod-tab .m-points { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.mod-tab .m-points span {
  font-size: 12.5px; font-weight: 600; padding: 4px 12px; border-radius: 999px;
}

.c-yellow { background: #FFF3D6; }
.c-blue { background: #E3F2FD; }
.c-pink { background: #FCE4EC; }
.c-green { background: #E8F5E9; }
.t-yellow { color: var(--orange-deep); } .t-blue { color: #1E88E5; }
.t-pink { color: #D81B60; } .t-green { color: #43A047; }
.b-yellow { background: #FFF3D6; color: var(--orange-deep); }
.b-blue { background: #E3F2FD; color: #1E88E5; }
.b-pink { background: #FCE4EC; color: #D81B60; }
.b-green { background: #E8F5E9; color: #43A047; }
.mod-tab.active.b-yellow { border-color: var(--orange); }
.mod-tab.active.b-blue { border-color: var(--blue); }
.mod-tab.active.b-pink { border-color: var(--pink); }
.mod-tab.active.b-green { border-color: var(--green); }

/* ---------- 特色深挖（交替布局） ---------- */
.features { padding: 70px 0 40px; }
.feat-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center;
  padding: 64px 0;
}
.feat-row.rev .f-media { order: 2; }
.f-media { position: relative; }
.f-copy .f-tag {
  display: inline-block; font-size: 13px; font-weight: 800; letter-spacing: 2px;
  padding: 5px 14px; border-radius: 999px; margin-bottom: 16px;
}
.f-copy h3 { font-size: clamp(24px, 3vw, 34px); font-weight: 900; line-height: 1.35; }
.f-copy > p { color: var(--ink-2); margin: 16px 0 22px; font-size: 16px; }
.f-list li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 9px 0; font-size: 15.5px; color: var(--ink);
}
.f-list li .ic {
  flex: 0 0 24px; width: 24px; height: 24px; border-radius: 8px; margin-top: 3px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: #fff; font-weight: 800;
}

/* 弹窗截图三联 */
.shot-trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.shot-trio figure {
  border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-md);
  border: 5px solid #17140F; transition: transform .3s;
  background: #17140F;
}
.shot-trio figure:hover { transform: translateY(-8px) scale(1.02); }
.shot-trio img { width: 100%; height: 100%; object-fit: cover; }
.shot-duo { display: grid; grid-template-columns: 1.25fr 1fr; gap: 18px; align-items: center; }

/* 通知特写卡片 */
.notif-showcase {
  border-radius: 26px; padding: 34px;
  background: linear-gradient(145deg, #2B3A4A, #17222E);
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.notif-showcase::before {
  content: ""; position: absolute; width: 220px; height: 220px; border-radius: 50%;
  background: rgba(249, 168, 37, .12); top: -70px; right: -60px;
}
.notif-showcase img { border-radius: 16px; box-shadow: 0 18px 40px rgba(0, 0, 0, .4); }
.notif-showcase .cap {
  color: rgba(255, 255, 255, .75); font-size: 13.5px; margin-top: 18px;
  display: flex; align-items: center; gap: 8px;
}

/* 精灵球说明块 */
.poke-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 24px; }
.poke-fact {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 20px; box-shadow: var(--shadow-sm); font-size: 14px;
}
.poke-fact b { display: block; font-size: 15px; margin-bottom: 4px; }
.poke-ball {
  display: inline-block; width: 26px; height: 26px; border-radius: 50%;
  border: 3px solid #222; position: relative; overflow: hidden; vertical-align: middle;
  margin-right: 6px;
}
.poke-ball::before { content: ""; position: absolute; inset: 0 0 50% 0; background: var(--c1, #EC407A); }
.poke-ball::after {
  content: ""; position: absolute; left: 0; right: 0; top: 50%; transform: translateY(-50%);
  height: 3px; background: #222;
}

/* ---------- 深色技术区 ---------- */
.tech {
  background:
    radial-gradient(700px 400px at 90% 10%, rgba(249, 168, 37, .14), transparent 60%),
    radial-gradient(600px 380px at 6% 85%, rgba(102, 187, 106, .10), transparent 60%),
    var(--dark);
  color: #F5EFE3; padding: 110px 0; margin-top: 60px;
}
.tech .sec-tag { background: rgba(249, 168, 37, .14); color: var(--orange-bright); }
.tech .sec-sub { color: #B9AF9E; }
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 10px; }
.tech-card {
  background: rgba(255, 255, 255, .045); border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 20px; padding: 28px 24px; transition: transform .3s, background .3s;
}
.tech-card:hover { transform: translateY(-6px); background: rgba(255, 255, 255, .08); }
.tech-card .t-ic { font-size: 30px; margin-bottom: 14px; }
.tech-card h4 { font-size: 17px; font-weight: 800; margin-bottom: 8px; color: #fff; }
.tech-card p { font-size: 13.5px; color: #B9AF9E; line-height: 1.7; }
.tech-stats {
  display: flex; gap: 60px; margin-top: 64px; flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, .1); padding-top: 48px; justify-content: center;
}
.tech-stats .hstat .num { color: var(--orange-bright); font-size: 40px; }
.tech-stats .hstat .lab { color: #B9AF9E; }
.arch-flow {
  margin-top: 56px; display: flex; align-items: stretch; gap: 14px; flex-wrap: wrap; justify-content: center;
}
.arch-node {
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 16px; padding: 16px 22px; text-align: center; min-width: 150px;
}
.arch-node b { display: block; font-size: 15px; color: #fff; }
.arch-node span { font-size: 12px; color: #B9AF9E; }
.arch-arrow { align-self: center; color: var(--orange); font-size: 22px; font-weight: 900; }

/* ---------- 吉祥物 ---------- */
.cats { padding: 110px 0 60px; }
.cats-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.cat-card {
  border-radius: 26px; overflow: hidden; position: relative;
  box-shadow: var(--shadow-md); cursor: pointer;
  aspect-ratio: 1; background: var(--cream);
}
.cat-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.cat-card:hover img { transform: scale(1.07); }
.cat-card .cat-name {
  position: absolute; left: 14px; bottom: 14px;
  background: rgba(255, 253, 247, .92); backdrop-filter: blur(6px);
  border-radius: 999px; padding: 7px 16px; font-size: 13.5px; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.cat-card.big { grid-row: span 2; aspect-ratio: auto; }
.cat-card.big img { height: 100%; }
.cats-note { text-align: center; color: var(--ink-3); font-size: 14px; margin-top: 30px; }

/* ---------- 路线图 ---------- */
.roadmap { padding: 60px 0 110px; }
.road-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.road-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm);
}
.road-card .r-stage { font-size: 12.5px; font-weight: 800; letter-spacing: 1px; padding: 4px 12px; border-radius: 999px; }
.road-card h4 { font-size: 18px; font-weight: 800; margin: 14px 0 8px; }
.road-card p { font-size: 14px; color: var(--ink-2); }

/* ---------- 底部 CTA + Footer ---------- */
.final-cta {
  padding: 100px 0; text-align: center;
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(249, 168, 37, .18), transparent 70%),
    var(--cream);
}
.final-cta .sec-title { margin-bottom: 14px; }
.final-cta p { color: var(--ink-2); margin-bottom: 34px; }
.final-cta .cat-sit { width: 130px; margin: 0 auto 20px; animation: bob2 5s ease-in-out infinite; }

footer { background: var(--dark); color: #B9AF9E; padding: 60px 0 34px; }
.foot-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.foot-brand { max-width: 340px; }
.foot-brand .nav-logo { color: #fff; margin-bottom: 12px; }
.foot-brand p { font-size: 13.5px; }
.foot-col h5 { color: #fff; font-size: 14px; margin-bottom: 14px; letter-spacing: 1px; }
.foot-col a { display: block; font-size: 13.5px; padding: 4px 0; transition: color .2s; }
.foot-col a:hover { color: var(--orange-bright); }
.foot-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08); margin-top: 44px; padding-top: 24px;
  font-size: 12.5px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(20, 14, 6, .82);
  backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .3s; padding: 30px;
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img { max-height: 90vh; border-radius: 22px; box-shadow: var(--shadow-lg); }
.lightbox .close {
  position: absolute; top: 22px; right: 30px; font-size: 34px; color: #fff;
  cursor: pointer; line-height: 1;
}

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .12s; }
.reveal[data-delay="2"] { transition-delay: .24s; }
.reveal[data-delay="3"] { transition-delay: .36s; }

/* ---------- Hero 利益点 ---------- */
.hero-chips { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.chip {
  background: #fff; border: 1.5px solid var(--line); border-radius: 999px;
  padding: 9px 18px; font-size: 14.5px; font-weight: 700; color: var(--ink);
  box-shadow: var(--shadow-sm);
}

/* ---------- 对比表 ---------- */
.compare { padding: 60px 0 90px; }
.vs-wrap { max-width: 880px; margin: 0 auto; }
.vs-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md);
  background: var(--card); font-size: 15.5px;
}
.vs-table th, .vs-table td {
  padding: 18px 26px; text-align: left; border-bottom: 1px solid var(--line);
  line-height: 1.6;
}
.vs-table th {
  font-size: 17px; font-weight: 800; background: #F7F1E4; color: var(--ink);
}
.vs-table tr:last-child td { border-bottom: none; }
.vs-table .vs-us { background: #FFF7E0; }
.vs-table thead .vs-us { background: linear-gradient(135deg, var(--orange-bright), var(--orange)); color: #fff; }
.vs-table td:first-child { color: var(--ink-3); }
.vs-table td.vs-us { color: var(--ink); font-weight: 500; }

/* ---------- 信任区（深色） ---------- */
.trust {
  background:
    radial-gradient(700px 400px at 90% 10%, rgba(249, 168, 37, .14), transparent 60%),
    radial-gradient(600px 380px at 6% 85%, rgba(102, 187, 106, .10), transparent 60%),
    var(--dark);
  color: #F5EFE3; padding: 110px 0;
}
.trust .sec-tag { background: rgba(249, 168, 37, .14); color: var(--orange-bright); }
.trust .sec-sub { color: #B9AF9E; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 10px; }
.trust-card {
  background: rgba(255, 255, 255, .045); border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 20px; padding: 30px 26px; transition: transform .3s, background .3s;
}
.trust-card:hover { transform: translateY(-6px); background: rgba(255, 255, 255, .08); }
.trust-card .t-ic {
  width: 56px; height: 56px; border-radius: 16px; font-size: 27px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(249, 168, 37, .16); margin-bottom: 16px;
}
.trust-card h4 { font-size: 17.5px; font-weight: 800; margin-bottom: 8px; color: #fff; }
.trust-card p { font-size: 13.8px; color: #B9AF9E; line-height: 1.75; }

/* ---------- FAQ ---------- */
.faq { padding: 100px 0 40px; }
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--card); border: 1.5px solid var(--line); border-radius: 18px;
  overflow: hidden; transition: border-color .25s, box-shadow .25s;
}
.faq-item[open] { border-color: var(--orange); box-shadow: var(--shadow-md); }
.faq-item summary {
  cursor: pointer; font-weight: 800; font-size: 16.5px;
  padding: 20px 26px; list-style: none; position: relative; user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 24px; top: 50%; transform: translateY(-50%);
  font-size: 22px; font-weight: 700; color: var(--orange-deep); transition: transform .25s;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 26px 22px; color: var(--ink-2); font-size: 15px; line-height: 1.8; }

/* ---------- CTA 附注 + Toast ---------- */
.cta-note { font-size: 13px; color: var(--ink-3); margin-top: 18px; }
.toast {
  position: fixed; left: 50%; bottom: 36px; transform: translate(-50%, 30px);
  background: var(--dark); color: #fff; font-size: 14.5px; font-weight: 600;
  padding: 14px 28px; border-radius: 999px; box-shadow: var(--shadow-lg);
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; z-index: 300;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 移动端专用文案切换 */
.only-m { display: none; }

/* ============================================================
   响应式（桌面样式不受影响：以下全部为新增媒体查询覆盖）
   ≤1024 过渡区 ｜ ≤768 手机主改造区
   ============================================================ */
@media (max-width: 1024px) {
  .hero-grid, .showcase-grid, .feat-row { grid-template-columns: 1fr; }
  .feat-row.rev .f-media { order: 0; }
  .showcase-phone { position: static; }
  .how-grid, .road-grid { grid-template-columns: 1fr 1fr; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .cats-grid { grid-template-columns: 1fr 1fr; }
  .cat-card.big { grid-row: auto; aspect-ratio: 1; }
  .float-notif { left: -10px; width: 260px; }
  .float-cat { width: 110px; right: -6px; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 72px; right: 4%;
    min-width: 220px; background: #fff; padding: 22px 34px;
    border-radius: 18px; box-shadow: var(--shadow-lg);
  }
}

@media (max-width: 768px) {
  .only-d { display: none; }
  .only-m { display: inline; }

  /* ---- 全局节奏 ---- */
  .container { width: 90%; }
  .hero { padding: 116px 0 56px; }
  .how { padding: 64px 0 24px; }
  .showcase, .features, .cats, .faq { padding: 64px 0 32px; }
  .compare { padding: 40px 0 64px; }
  .trust { padding: 76px 0; }
  .roadmap { padding: 40px 0 76px; }
  .final-cta { padding: 72px 0; }
  .sec-head { margin-bottom: 38px; }
  .sec-sub { font-size: 15.5px; }

  /* ---- 导航 ---- */
  .nav-inner { height: 62px; }
  .nav-logo { font-size: 18px; gap: 9px; }
  .nav-logo img { width: 36px; height: 36px; border-radius: 10px; }
  .nav-cta { padding: 8px 18px; font-size: 13px; }
  .nav-toggle { font-size: 23px; }

  /* ---- Hero：竖排居中，去悬浮杂物 ---- */
  .hero-grid { gap: 34px; }
  .hero-copy { text-align: center; }
  .badge { font-size: 12.5px; padding: 6px 14px; }
  .hero h1 { margin: 16px 0 14px; font-size: clamp(24px, 7.2vw, 29px); letter-spacing: 0; text-wrap: balance; }
  .hero h1 .hl, .hero h1 .hl-pink { padding: 0 2px; }
  .hero-desc { margin-inline: auto; font-size: 16px; }
  .hero-chips { justify-content: center; gap: 8px; margin-top: 20px; }
  .chip { padding: 8px 14px; font-size: 13px; }
  .hero-actions {
    justify-content: center; gap: 12px; margin-top: 24px;
    flex-direction: column; align-items: stretch;
    max-width: 320px; margin-inline: auto; width: 100%;
  }
  .hero-actions .btn { width: 100%; justify-content: center; padding: 14px 20px; font-size: 15px; }
  .hero-stats {
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px 24px;
    margin-top: 32px; justify-items: center; max-width: 340px; margin-inline: auto;
  }
  .hstat .num { font-size: 24px; }
  .hstat .num small { font-size: 13px; }
  .hero-visual { transform: scale(.96); transform-origin: top center; }
  .phone { width: 252px; border-radius: 38px; padding: 8px; }
  .phone-screen { border-radius: 31px; }
  .phone-notch { top: 18px; width: 84px; height: 20px; }
  .float-notif, .float-chip { display: none; }
  .float-cat { width: 88px; right: -4px; bottom: -10px; }

  /* ---- 三步监督 ---- */
  .how-grid { grid-template-columns: 1fr; gap: 14px; }
  .how-card { padding: 24px 20px; }
  .how-num { font-size: 42px; top: 18px; right: 20px; }
  .how-icon { width: 50px; height: 50px; font-size: 24px; margin-bottom: 14px; }
  .how-card h3 { font-size: 18px; }
  .how-card p { font-size: 14.5px; }

  /* ---- 四大功能：截图在上，卡片在下 ---- */
  .showcase-grid { gap: 38px; }
  .showcase-phone .phone { width: 258px; }
  .showcase-phone .phone-screen img { min-height: 0; }
  #showcase-cap { font-size: 13px; }
  .mod-tabs { gap: 12px; }
  .mod-tab { padding: 18px 16px; gap: 14px; }
  .mod-tab .m-icon { flex-basis: 46px; width: 46px; height: 46px; font-size: 22px; border-radius: 14px; }
  .mod-tab h3 { font-size: 17px; }
  .mod-tab h3 .en { display: none; }
  .mod-tab p { font-size: 13.5px; }
  .mod-tab .m-points span { font-size: 11.5px; padding: 3px 10px; }
  .mod-tab.active { transform: none; }
  .mod-tab:hover { transform: none; }

  /* ---- 特色深挖：截图变横向滑动条 ---- */
  .feat-row { gap: 36px; padding: 42px 0; }
  .f-copy h3 { font-size: 23px; }
  .f-copy > p { font-size: 15px; }
  .f-list li { font-size: 14.5px; padding: 7px 0; }
  .shot-trio, .shot-duo {
    display: flex; overflow-x: auto; gap: 12px; padding: 4px 2px 14px;
    scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
  }
  .shot-trio::-webkit-scrollbar, .shot-duo::-webkit-scrollbar { height: 0; }
  .shot-trio figure, .shot-duo figure { flex: 0 0 76%; scroll-snap-align: center; }
  .notif-showcase { padding: 20px; }
  .notif-showcase .cap { font-size: 12px; margin-top: 12px; }
  .poke-facts { grid-template-columns: 1fr; gap: 10px; margin-top: 16px; }
  .poke-fact { padding: 14px 16px; font-size: 13px; }

  /* ---- 对比表 → 竖卡 ---- */
  .vs-table, .vs-table tbody, .vs-table tr, .vs-table td { display: block; }
  .vs-table thead { display: none; }
  .vs-table { background: transparent; box-shadow: none; }
  .vs-table tr {
    background: var(--card); border-radius: 18px; overflow: hidden;
    box-shadow: var(--shadow-sm); margin-bottom: 14px; border-bottom: none;
  }
  .vs-table td { padding: 14px 18px 16px; font-size: 14px; line-height: 1.65; }
  .vs-table td:first-child { background: #F3EFE6; }
  .vs-table td:first-child::before {
    content: "普通打卡 App"; display: block;
    font-size: 11px; font-weight: 800; letter-spacing: 2px;
    color: var(--ink-3); margin-bottom: 5px;
  }
  .vs-table td.vs-us { background: #FFF3D0; padding-top: 14px; }
  .vs-table td.vs-us::before {
    content: "大橘督学 🍊"; display: block;
    font-size: 11px; font-weight: 800; letter-spacing: 2px;
    color: var(--orange-deep); margin-bottom: 5px;
  }

  /* ---- 信任区 ---- */
  .trust-grid { grid-template-columns: 1fr; gap: 14px; }
  .trust-card { padding: 24px 22px; }

  /* ---- 猫画廊 ---- */
  .cats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .cat-card { border-radius: 18px; }
  .cat-card .cat-name { font-size: 11px; padding: 5px 10px; left: 10px; bottom: 10px; }
  .cats-note { font-size: 12.5px; margin-top: 20px; }

  /* ---- FAQ ---- */
  .faq-item summary { padding: 16px 20px; font-size: 15px; padding-right: 48px; }
  .faq-item summary::after { right: 20px; font-size: 19px; }
  .faq-item p { padding: 0 20px 18px; font-size: 14px; }

  /* ---- 路线图 ---- */
  .road-grid { grid-template-columns: 1fr; gap: 14px; }
  .road-card { padding: 22px; }

  /* ---- 终章 CTA ---- */
  .cat-sit { width: 104px; }
  .final-cta .hero-actions { flex-direction: column; align-items: stretch; max-width: 320px; margin-inline: auto; width: 100%; }
  .cta-note { margin-top: 14px; }

  /* ---- 页脚 ---- */
  .foot-grid { flex-direction: column; gap: 26px; }
  .foot-bottom { flex-direction: column; gap: 6px; text-align: center; }

  /* ---- 灯箱 ---- */
  .lightbox img { border-radius: 16px; }
}