/* 猫番阅读 mmspapp.cn — 墨 × 白 × 金 × 松绿 四色体系
   阴影语言：大区块外容器单组阴影、全页参数不重复、FAQ 朝下 */

:root {
  --ink: #131722;
  --ink-2: #232a3a;
  --ink-3: #3d4356;
  --paper: #ffffff;
  --mist: #faf7ef;
  --line: #ece5d2;
  --gold: #f0b020;
  --gold-deep: #b97f14;
  --gold-tint: #fdf3dd;
  --pine: #0e4f43;
  --pine-deep: #093530;
  --pine-tint: #e7f0ed;
  --shadow-ink: rgba(19, 23, 34, .16);
}

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

html { scroll-behavior: smooth; }

body {
  font: 16px/1.75 "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }

.wrap { width: min(1160px, 92%); margin: 0 auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 26px; border-radius: 10px;
  font-weight: 700; font-size: 15.5px; line-height: 1.4;
  border: 2px solid transparent; cursor: pointer;
  transition: transform .18s ease, background .18s ease;
}
.btn-pri { background: var(--gold); color: var(--ink); }
.btn-pri:hover { background: #f7bd3a; transform: translateY(-2px); }
.btn-line { border-color: var(--pine); color: var(--pine); background: transparent; }
.btn-line:hover { background: var(--pine-tint); }
.btn-ink {
  background: var(--ink); color: var(--gold);
  box-shadow: 0 3px 0 rgba(19, 23, 34, .45);
}
.btn-ink:hover { transform: translateY(-2px); background: var(--ink-2); }
.btn-lg { padding: 15px 38px; font-size: 17px; border-radius: 12px; }

/* ---------- 顶栏 ---------- */
.hd {
  position: sticky; top: 0; z-index: 900;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.hd-in { display: flex; align-items: center; gap: 26px; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand img { border-radius: 9px; box-shadow: 0 2px 5px var(--shadow-ink); }
.brand-t { display: flex; flex-direction: column; line-height: 1.25; }
.brand-t strong { font-size: 19px; letter-spacing: 1px; }
.brand-t small { font-size: 11.5px; color: var(--ink-3); letter-spacing: .4px; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a { padding: 8px 13px; border-radius: 8px; font-size: 14.5px; color: var(--ink-3); }
.nav a:hover { color: var(--pine); background: var(--pine-tint); }
.nav a.on { color: var(--pine); font-weight: 700; position: relative; }
.nav a.on::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 2px;
  height: 3px; border-radius: 2px; background: var(--gold);
}
.hd-r { display: flex; align-items: center; gap: 12px; }
.hd-cta { box-shadow: 0 2px 4px var(--shadow-ink); padding: 9px 20px; font-size: 14.5px; }
.burger {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line);
  border-radius: 10px; background: #fff; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.burger span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; }

/* ---------- 英雄区 ---------- */
.hero { background: linear-gradient(180deg, var(--gold-tint) 0%, #fff 100%); overflow: hidden; }
.hero-in {
  display: flex; align-items: center; gap: 40px;
  padding: 64px 0 70px;
}
.hero-l { flex: 1.06; min-width: 0; }
.kick {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12.5px; letter-spacing: 2.5px; font-weight: 700;
  color: var(--pine); text-transform: uppercase;
}
.kick i {
  font-style: normal; width: 26px; height: 26px; border-radius: 7px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--gold); color: var(--ink); font-size: 14px; letter-spacing: 0;
}
h1 { font-size: clamp(44px, 6vw, 62px); font-weight: 900; letter-spacing: 4px; margin: 14px 0 6px; }
.lead { color: var(--ink-3); font-size: 16.5px; margin: 14px 0 26px; max-width: 560px; }
.hero-acts { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.hero-points li {
  font-size: 13.5px; font-weight: 700; color: var(--pine);
  background: #fff; border: 1px solid var(--line); border-bottom: 3px solid var(--pine);
  padding: 7px 14px; border-radius: 9px;
}

/* 英雄右视觉 ⑥卷轴横幅：横向画卷 + 双轴头，截图居中 */
.hero-r { flex: .94; }
.scrollstage { position: relative; height: 580px; }
.sc-back {
  position: absolute; right: 0; top: 5%; width: 76%; height: 78%;
  border-radius: 16px;
  background:
    repeating-linear-gradient(135deg, rgba(255, 255, 255, .04) 0 2px, transparent 2px 15px),
    var(--pine);
}
.sc-cloth {
  position: absolute; left: 1%; right: 5%; top: 31%; height: 42%;
  background:
    repeating-linear-gradient(0deg, rgba(185, 127, 20, .07) 0 2px, transparent 2px 12px),
    var(--gold-tint);
  border: 1px solid #f0dfae;
  border-radius: 12px;
}
.sc-rod {
  position: absolute; top: 22%; height: 60%; width: 24px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold) 55%, var(--gold-deep));
  border-radius: 12px;
}
.sc-rod-l { left: -3%; }
.sc-rod-r { right: 1%; }
.sc-rod i {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--ink);
}
.sc-shot {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: min(44%, 236px); margin: 0;
  border: 6px solid #fff; border-radius: 18px;
  background: #fff;
  box-shadow: 18px 22px 0 rgba(14, 79, 67, .10);
}
.sc-shot img { display: block; width: 100%; height: auto; border-radius: 12px; }
.sc-tag {
  position: absolute; background: #fff; border-radius: 12px;
  padding: 10px 16px 11px; line-height: 1.4;
  border: 1px solid var(--line);
}
.sc-tag b { display: block; font-size: 15px; }
.sc-tag span { font-size: 12px; color: var(--ink-3); }
.sc-tag-a { left: 2%; top: 9%; border-left: 5px solid var(--pine); }
.sc-tag-b { right: 4%; bottom: 8%; border-left: 5px solid var(--gold-deep); }
.sc-stamp {
  position: absolute; left: 5%; bottom: 3%;
  display: inline-flex; align-items: center; gap: 6px;
  background: #fff; border-radius: 999px; padding: 5px 12px 5px 6px;
  border: 1px solid var(--line);
}
.sc-stamp img { width: 30px; height: 30px; border-radius: 50%; }
.sc-stamp i { font-style: normal; font-size: 12px; font-weight: 800; color: var(--gold-deep); }

/* ---------- 通用区块 ---------- */
.sec { padding: 78px 0; }
.sec-mist { background: var(--mist); }
.sec-pine { background: var(--pine); color: #fff; }
.sec-pine .kick { color: var(--gold); }
.sec-pine h2 { color: #fff; }
.sec-pine .sec-sub { color: #b9d2cb; }
.sec-h { max-width: 720px; margin-bottom: 42px; }
.sec-h h2 { font-size: clamp(26px, 3vw, 34px); font-weight: 900; letter-spacing: 1px; margin: 10px 0 8px; }
.sec-sub { color: var(--ink-3); font-size: 15px; }

/* ---------- 书源聚合墙 ---------- */
.srcbox {
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 16px;
  padding: 28px 28px 24px;
  background: rgba(255, 255, 255, .06);
  box-shadow: -12px 16px 0 rgba(240, 176, 32, .16);
}
.src-row { display: flex; flex-wrap: wrap; gap: 12px; }
.src-chip {
  display: inline-flex; align-items: center;
  padding: 9px 18px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .35);
  font-size: 14px; color: #eaf3f0;
  background: rgba(255, 255, 255, .05);
}
.src-chip:hover { border-color: var(--gold); color: var(--gold); }
.src-on { background: var(--gold); color: var(--ink); border-color: var(--gold); font-weight: 700; }
.src-note { margin-top: 18px; font-size: 13px; color: #b9d2cb; }

/* ---------- 功能 2×3 六格 ---------- */
.grid6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.g6 {
  position: relative;
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 24px 24px 22px;
}
.g6:nth-child(odd) { border-top: 4px solid var(--gold); }
.g6:nth-child(even) { border-top: 4px solid var(--pine); }
.g6 h3 { font-size: 17.5px; margin: 9px 0 6px; }
.g6 p { font-size: 14px; color: var(--ink-3); }
.g6-no {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 34px; height: 24px; padding: 0 8px;
  background: var(--pine); color: #fff;
  font-weight: 900; font-size: 12.5px; border-radius: 7px;
}
.g6:nth-child(even) .g6-no { background: var(--gold); color: var(--ink); }
.g6-1 {
  background: var(--pine); color: #fff;
  border: 0; border-top: 4px solid var(--gold);
  box-shadow: 10px 12px 0 var(--gold);
}
.g6-1 p { color: #c6dbd5; }
.g6-1 .g6-no { background: var(--gold); color: var(--ink); }
.g6-side {
  position: absolute; top: 24px; right: 22px;
  writing-mode: vertical-rl; letter-spacing: 3px;
  font-size: 11px; font-weight: 800; color: var(--gold);
}

/* ---------- 界面两行错落 ---------- */
.wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; padding: 6px 0 30px; }
.wa {
  position: relative; margin: 0;
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden;
}
.wa:nth-child(odd) { border-top: 4px solid var(--gold); }
.wa:nth-child(even) { border-top: 4px solid var(--pine); }
.wa:nth-child(even) { transform: translateY(22px); }
.wa img { display: block; width: auto; max-width: 300px; height: auto; margin: 0 auto; }
.wa figcaption {
  padding: 10px 14px 12px; font-size: 12.5px; color: var(--ink-3);
  border-top: 1px dashed var(--line);
}
.wa-no {
  position: absolute; top: 10px; left: 10px; z-index: 2;
  background: var(--ink); color: var(--gold);
  font-size: 11.5px; font-weight: 800; letter-spacing: 1px;
  padding: 3px 9px; border-radius: 7px;
}

/* ---------- 导入三步 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.st {
  position: relative;
  background: #fff; border: 1px solid var(--line);
  border-left: 6px solid var(--gold);
  border-radius: 14px; padding: 24px 24px 22px;
}
.st-mid { border-left-color: var(--pine); transform: translateY(20px); }
.st-no {
  display: inline-flex; align-items: center;
  padding: 5px 14px; border-radius: 999px;
  background: var(--pine); color: #fff;
  font-size: 12.5px; font-weight: 800; letter-spacing: 1px;
}
.st-mid .st-no { background: var(--gold); color: var(--ink); }
.st h3 { font-size: 17.5px; margin: 12px 0 6px; }
.st p { font-size: 14px; color: var(--ink-3); }
.st:not(.st-mid)::after {
  content: "→"; position: absolute; right: -20px; top: 46%;
  color: var(--gold-deep); font-weight: 900; font-size: 20px; z-index: 2;
}

/* ---------- FAQ details ---------- */
.fqlist { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.fq {
  background: #fff; border: 1px solid var(--line); border-radius: 13px;
  overflow: hidden;
  transition: box-shadow .25s ease;
}
.fq[open] {
  border-color: var(--pine-tint);
  box-shadow: 8px 9px 0 rgba(14, 79, 67, .12), -8px 9px 0 rgba(240, 176, 32, .20);
}
.fq summary {
  display: flex; align-items: center; gap: 14px;
  padding: 17px 20px; cursor: pointer; list-style: none;
  font-weight: 700; font-size: 16px; color: var(--ink);
}
.fq summary::-webkit-details-marker { display: none; }
.fq-no {
  flex: none; width: 34px; height: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--pine); color: #fff; font-size: 12.5px; font-weight: 800;
  border-radius: 7px;
}
.fq:nth-child(even) .fq-no { background: var(--gold); color: var(--ink); }
.fq-q { flex: 1; }
.fq summary i { position: relative; flex: none; width: 16px; height: 16px; }
.fq summary i::before, .fq summary i::after {
  content: ""; position: absolute; background: var(--pine);
  border-radius: 2px; transition: transform .25s ease;
}
.fq summary i::before { left: 0; right: 0; top: 7px; height: 2px; }
.fq summary i::after { top: 0; bottom: 0; left: 7px; width: 2px; }
.fq[open] summary i::after { transform: scaleY(0); }
.fq[open] .fq-no { background: var(--pine-deep); }
.fq p { padding: 0 20px 20px; color: var(--ink-3); font-size: 14.5px; }

/* ---------- 留言错位双列 ---------- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 980px; margin: 0 auto; }
.du {
  background: #fff; border: 1px solid var(--line); border-radius: 13px;
  padding: 18px 20px 17px;
}
.du:nth-child(odd) { border-top: 4px solid var(--gold); }
.du:nth-child(even) { border-top: 4px solid var(--pine); transform: translateY(26px); }
.du header {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; margin-bottom: 7px;
}
.du b { font-size: 15px; }
.du time { font-size: 12.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.du p { font-size: 14.5px; color: var(--ink-3); }

/* ---------- 底部下载斜切条 ---------- */
.dlsash {
  position: relative;
  background: var(--pine);
  padding: 36px 0;
  box-shadow: 0 16px 30px rgba(14, 79, 67, .30);
  overflow: hidden;
}
.dlsash::before {
  content: ""; position: absolute; right: 0; top: 0; bottom: 0; width: 42%;
  background: var(--gold);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
}
.dl-in { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.dl-l { display: flex; align-items: center; gap: 16px; }
.dl-l img { border-radius: 12px; }
.dl-l b { display: block; color: #fff; font-size: 19px; letter-spacing: 1px; }
.dl-l span { color: #b9d2cb; font-size: 13.5px; }
.dl-r { text-align: center; }
.dl-r p { margin-top: 9px; font-size: 12.5px; color: #6b5410; font-weight: 600; }

/* ---------- 页脚 ---------- */
.ft { background: var(--mist); border-top: 3px solid var(--pine); padding: 30px 0 22px; }
.ft-in { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.ft-links { display: flex; gap: 18px; }
.ft-links a { font-size: 13.5px; color: var(--ink-3); }
.ft-links a:hover { color: var(--pine); }
.ft-icp { text-align: center; margin-top: 16px; }
.ft-icp a { font-size: 12.5px; color: var(--ink-3); }
.ft-c { text-align: center; font-size: 12.5px; color: var(--ink-3); margin-top: 6px; }

/* ---------- 返回顶部 ---------- */
.backtop {
  position: fixed; right: 24px; bottom: 40px; z-index: 99980;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--pine); color: #fff;
  font-size: 20px; font-weight: 900; border: 0; cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity .25s ease, transform .25s ease;
  box-shadow: 0 8px 18px rgba(19, 23, 34, .28);
}
.backtop.on { opacity: 1; visibility: visible; transform: none; }

/* ---------- 入场动画 ---------- */
.rv { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  .btn, .fq summary i::before, .fq summary i::after { transition: none; }
}

/* ---------- 移动端 ---------- */
@media (max-width: 960px) {
  .grid6 { grid-template-columns: 1fr 1fr; }
  .wall { grid-template-columns: 1fr 1fr; }
  .wa:nth-child(even) { transform: none; }
  .steps { grid-template-columns: 1fr; }
  .st-mid { transform: none; }
  .st:not(.st-mid)::after { display: none; }
  .scrollstage { height: 500px; }
}

@media (max-width: 768px) {
  .hd-in { height: 62px; gap: 12px; }
  .nav {
    position: absolute; top: 62px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 10px 16px; gap: 2px;
    display: none;
    box-shadow: 0 14px 22px rgba(19, 23, 34, .10);
  }
  .nav.open { display: flex; }
  .nav a { padding: 11px 12px; font-size: 15px; }
  .burger { display: inline-flex; }
  .hd-cta { padding: 8px 14px; font-size: 13.5px; }

  /* 手机端英雄区：文案在上、画面在下 */
  .hero-in { flex-direction: column; align-items: stretch; gap: 30px; padding: 40px 0 46px; }
  h1 { letter-spacing: 2px; }
  .lead { font-size: 15px; }
  .scrollstage { height: 450px; }
  .sc-shot { width: min(50%, 210px); }
  .sc-tag { padding: 8px 12px 9px; }
  .sc-tag b { font-size: 13.5px; }
  .sc-tag span { font-size: 11px; }

  .sec { padding: 56px 0; }
  .sec-h { margin-bottom: 30px; }
  .srcbox { padding: 20px 18px; box-shadow: -8px 12px 0 rgba(240, 176, 32, .16); }

  /* 界面区：一排横滑 */
  .wall { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; gap: 14px; padding: 4px 2px 26px; }
  .wall::-webkit-scrollbar { height: 8px; }
  .wall::-webkit-scrollbar-thumb { background: var(--pine-tint); border-radius: 4px; }
  .wa { flex: 0 0 208px; scroll-snap-align: start; transform: none; }
  .wa img { width: 100%; height: auto; }

  .grid6 { grid-template-columns: 1fr; gap: 14px; }
  .g6-1 { box-shadow: 7px 9px 0 var(--gold); }

  .duo { grid-template-columns: 1fr; gap: 14px; }
  .du:nth-child(even) { transform: none; }
  .du header { flex-wrap: wrap; gap: 4px 12px; }

  .fq summary { padding: 14px 16px; font-size: 15px; gap: 10px; }
  .fq p { padding: 0 16px 16px; font-size: 14px; }
  .fq[open] { box-shadow: 6px 7px 0 rgba(14, 79, 67, .12), -6px 7px 0 rgba(240, 176, 32, .20); }

  .dlsash::before { display: none; }
  .dl-in { flex-direction: column; text-align: center; }
  .dl-l { flex-direction: column; text-align: center; }
  .dl-r { width: 100%; }
  .dl-r p { color: #b9d2cb; font-weight: 400; }
  .btn-lg { width: 100%; }
  .backtop { right: 16px; bottom: 30px; width: 42px; height: 42px; }
}