@charset "utf-8";
/* ==========================================================================
   囧次元 · jiongciyuandm.net
   视觉方向 B1「深夜阅读」：墨蓝灰底 + 暖橙 / 琥珀点缀
   渲染语言「书脊灯栏」：组件左缘一道渐变书脊灯条 + H2 前一枚阅读灯圆点 + 区块间书脊缝
   ========================================================================== */

:root {
  --bg: #131A24;
  --bg2: #1A2230;
  --bg3: #212B3A;
  --bg4: #29354A;
  --line: #344155;
  --ink: #EDF1F7;
  --ink2: #A7B5C9;
  --ink3: #7C8A9E;
  --main: #FF9440;
  --main-d: #C9651A;
  --main-s: #3A2415;
  --aux: #E9B44C;
  --aux-d: #A8781F;
  --acc: #FFE9C7;
  --r: 12px;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.78 "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", system-ui, sans-serif;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--aux); text-decoration: none; }
a:hover { color: var(--main); }
h1, h2, h3 { margin: 0; line-height: 1.4; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap { width: min(1180px, 92vw); margin: 0 auto; }
.sec { padding: 74px 0; }

/* ── 标题与副题 ─────────────────────────────────────────── */
.kicker {
  display: block;
  font: 600 12px/1 "Segoe UI", system-ui, sans-serif;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--aux);
  margin-bottom: 14px;
}

.h2 {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: .01em;
  display: flex;
  align-items: center;
}

.lamp {
  flex: none;
  width: 14px;
  height: 14px;
  margin-right: 13px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--main), var(--aux));
  animation: lampOn .5s ease-out .1s both, halo 3.2s ease-out 1s infinite;
}

.sub {
  color: var(--ink2);
  margin-top: 12px;
  font-size: 15.5px;
}

/* 区块之间的「书脊缝」分隔 */
.shelf {
  height: 1px;
  border-top: 1px dashed rgba(233, 180, 76, .22);
  position: relative;
}
.shelf::before, .shelf::after {
  content: "";
  position: absolute;
  top: -3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--aux);
  opacity: .55;
}
.shelf::before { left: 0; }
.shelf::after { right: 0; }

/* ── 按钮 ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 16px;
  font-weight: 700;
  color: #20140A;
  background: linear-gradient(135deg, var(--main), var(--aux));
  box-shadow: 0 10px 24px -12px rgba(255, 148, 64, .75);
  transition: filter .18s, transform .18s;
}
.btn:hover { color: #20140A; filter: brightness(1.07); }
.btn--sm { padding: 9px 20px; font-size: 14px; }
.btn--wide { padding: 17px 46px; font-size: 17px; }
.btn--ghost {
  background: transparent;
  color: var(--acc);
  border-color: rgba(233, 180, 76, .5);
  box-shadow: none;
}
.btn--ghost:hover { color: var(--main); border-color: var(--main); }

/* ── 顶栏 ───────────────────────────────────────────────── */
.top {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(19, 26, 36, .95);
  border-bottom: 1px solid var(--line);
}
.top__in {
  width: min(1180px, 92vw);
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.brand__logo { width: 42px; height: 42px; border-radius: 11px; }
.brand__name { color: var(--ink); font-size: 20px; font-weight: 700; letter-spacing: .04em; }
.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  display: block;
  padding: 9px 15px;
  border-radius: 9px;
  color: var(--ink2);
  font-size: 15px;
}
.nav a:hover { color: var(--ink); background: var(--bg3); }
.nav a[aria-current="page"] { color: var(--main); background: var(--main-s); }
.top .btn { color: #20140A; }

.burger {
  display: none;
  flex: none;
  width: 42px;
  height: 38px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg2);
  cursor: pointer;
}
.burger span { display: block; height: 2px; background: var(--ink); border-radius: 2px; }
.burger span + span { margin-top: 5px; }

/* ── Hero：左文右图（DOM 中文本块在 <figure> 之前）────────── */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(660px 430px at 86% -8%, rgba(255, 148, 64, .21), transparent 68%),
    radial-gradient(520px 340px at 2% 110%, rgba(233, 180, 76, .13), transparent 70%),
    var(--bg2);
}
.hero::before {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--main) 30%, var(--aux) 70%, transparent);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg,
    rgba(255, 255, 255, .05) 0 1px, transparent 1px 5px,
    rgba(255, 255, 255, .05) 5px 6px, transparent 6px 344px);
}
.hero__in {
  position: relative;
  z-index: 1;
  width: min(1180px, 92vw);
  margin: 0 auto;
  padding: 56px 0 66px;
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: .02em;
  margin: 0 0 18px;
}
.hero__lead { color: var(--ink2); font-size: 16.5px; max-width: 34em; }
.hero__acts { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero__shot { margin: 0; }
.hero__shot img {
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
  border-radius: 18px;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .8), 0 0 0 1px rgba(255, 148, 64, .18);
}

/* 内页 Hero 收一档：面包屑之上还要留出一屏的余量 */
.hero--inner .hero__in { padding: 42px 0 50px; }
.hero--inner .hero__shot img { max-width: 270px; }

/* ── 事实带（压 Hero 底边）──────────────────────────────── */
.facts__in {
  width: min(1180px, 92vw);
  margin: -30px auto 0;
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}
.fact { background: var(--bg3); padding: 20px 18px; }
.fact__n { font-size: 18px; font-weight: 700; color: var(--main); }
.fact__k { font-size: 13.5px; color: var(--ink2); margin-top: 4px; }

/* ── 分类导航主区（A1 结构变体核心）────────────────────── */
.catalog__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 30px;
  align-items: start;
}
.catalog__rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.railbox { background: var(--bg3); border: 1px solid var(--line); border-radius: 10px; padding: 14px 14px 8px; }
.railbox__t { font-size: 13.5px; color: var(--aux); font-weight: 700; letter-spacing: .06em; }
.raillist { margin-top: 8px; }
.raillist li { padding: 6px 0; border-top: 1px solid rgba(52, 65, 85, .7); }
.raillist__k { display: block; font-size: 14px; color: var(--ink); }
.raillist__v { display: block; font-size: 12px; color: var(--ink3); margin-top: 1px; }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.entry {
  display: block;
  position: relative;
  overflow: hidden;
  background: var(--bg3);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px 20px 20px 24px;
  transition: border-color .18s, transform .18s;
}
.entry::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--main), var(--aux));
}
.entry:hover { border-color: var(--main); transform: translateY(-3px); }
.entry__n { font: 700 12px/1 "Segoe UI", system-ui, sans-serif; color: var(--aux); letter-spacing: .18em; }
.entry__t { font-size: 17px; color: var(--ink); margin-top: 10px; }
.entry__d { font-size: 14.5px; color: var(--ink2); margin-top: 8px; }
.entry__go { display: block; font-size: 13px; color: var(--main); margin-top: 12px; }

/* ── 阅读体验专章 ──────────────────────────────────────── */
.read__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 30px; }
.readcol {
  position: relative;
  overflow: hidden;
  background: var(--bg3);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px 22px 22px 26px;
}
.readcol::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--main), var(--aux));
}
.readcol__t { font-size: 17px; color: var(--ink); }
.readcol p { font-size: 14.5px; color: var(--ink2); margin-top: 10px; }
.readcol b { color: var(--acc); font-weight: 700; }

.phones { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; max-width: 720px; margin: 30px auto 0; }
.phone { margin: 0; }
.phone img {
  width: 100%;
  max-width: 300px;
  height: auto;
  margin: 0 auto;
  border-radius: 16px;
  box-shadow: 0 24px 48px -28px rgba(0, 0, 0, .85), 0 0 0 1px rgba(233, 180, 76, .2);
}
.phone figcaption, .shot figcaption { font-size: 13.5px; color: var(--ink3); margin-top: 12px; text-align: center; }

/* ── 界面栅格 ──────────────────────────────────────────── */
.shots__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px; margin-top: 30px; align-items: start; }
.shot { margin: 0; }
.shot img {
  width: 100%;
  max-width: 300px;
  height: auto;
  margin: 0 auto;
  border-radius: 14px;
  box-shadow: 0 22px 44px -26px rgba(0, 0, 0, .8), 0 0 0 1px rgba(52, 65, 85, .9);
}

/* ── 内页入口卡 ────────────────────────────────────────── */
.xentry { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 30px; }
.xcard {
  display: block;
  position: relative;
  overflow: hidden;
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 26px 24px 24px 28px;
  transition: border-color .18s;
}
.xcard::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--main), var(--aux));
}
.xcard:hover { border-color: var(--main); }
.xcard__t { font-size: 19px; color: var(--ink); }
.xcard__d { font-size: 14.5px; color: var(--ink2); margin-top: 10px; }
.xcard__go { display: block; font-size: 13px; color: var(--main); margin-top: 14px; }

/* ── 评价 ───────────────────────────────────────────────── */
.voices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 30px; }
.voice { background: var(--bg3); border: 1px solid var(--line); border-radius: 10px; padding: 22px; }
.voice__t { font-size: 15.5px; color: var(--ink); font-weight: 700; }
.stars { display: block; color: var(--aux); letter-spacing: .2em; font-size: 13px; margin-top: 8px; }
.voice__b { font-size: 14.5px; color: var(--ink2); margin-top: 12px; }

/* ── FAQ ────────────────────────────────────────────────── */
.faq { margin-top: 30px; display: grid; gap: 10px; }
.faq details {
  background: var(--bg3);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
}
.faq details[open] { border-color: rgba(255, 148, 64, .55); }
.faq summary { cursor: pointer; font-size: 15.5px; color: var(--ink); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+"; color: var(--main); font-weight: 700; margin-right: 10px; }
.faq details[open] summary::before { content: "\2212"; }
.faq p { font-size: 14.5px; color: var(--ink2); margin-top: 10px; padding-left: 22px; }

/* ── CTA：夜读合书条 ───────────────────────────────────── */
.cta {
  position: relative;
  background:
    radial-gradient(720px 300px at 50% 0%, rgba(255, 148, 64, .16), transparent 72%),
    var(--bg2);
  border-top: 2px solid var(--main-d);
  border-bottom: 2px solid var(--main-d);
  text-align: center;
}
.cta__in { width: min(1180px, 92vw); margin: 0 auto; padding: 62px 0; }
.cta .h2 { justify-content: center; }
.cta__p { color: var(--ink2); margin-top: 14px; }
.cta__acts { margin-top: 28px; }
.cta .btn { color: #20140A; }

/* ── 页脚 ───────────────────────────────────────────────── */
.foot { background: #0E141D; border-top: 1px solid var(--line); padding: 46px 0 34px; }
.foot__in { width: min(1180px, 92vw); margin: 0 auto; }
.foot__brand { display: flex; align-items: center; gap: 11px; }
.foot__logo { width: 36px; height: 36px; border-radius: 10px; }
.foot__name { font-size: 18px; font-weight: 700; color: var(--ink); }
.foot__nav { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; }
.foot__nav a { font-size: 14px; color: var(--ink2); }
.foot__nav a:hover { color: var(--main); }
.foot__note { font-size: 13.5px; color: var(--ink3); margin-top: 20px; line-height: 1.9; }
.foot__copy { font-size: 13px; color: var(--ink3); margin-top: 14px; }
.foot .btn { color: #20140A; margin-top: 20px; }

/* ── 内页顶部小横幅 ────────────────────────────────────── */
.pagebar { background: var(--bg2); border-bottom: 1px solid var(--line); }
.pagebar__in { width: min(1180px, 92vw); margin: 0 auto; padding: 28px 0; }
.crumb { font-size: 13.5px; color: var(--ink3); }
.crumb a { color: var(--ink2); }

/* ── 长文排版 ──────────────────────────────────────────── */
.prose { max-width: 62em; }
.prose h3 { font-size: 18px; color: var(--ink); margin-top: 26px; }
.prose p { font-size: 15.5px; color: var(--ink2); margin-top: 14px; }
.prose li { font-size: 15.5px; color: var(--ink2); margin-top: 10px; padding-left: 20px; position: relative; }
.prose li::before {
  content: "";
  position: absolute;
  left: 2px; top: 11px;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: var(--main);
}
.prose b { color: var(--acc); }

.steps { display: grid; gap: 14px; margin-top: 26px; }
.step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  background: var(--bg3);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
}
.step__n {
  font: 800 20px/1.4 "Segoe UI", system-ui, sans-serif;
  color: var(--main);
  border-right: 1px solid var(--line);
}
.step__b { font-size: 15px; color: var(--ink2); }
.step__b strong { display: block; color: var(--ink); font-size: 16px; margin-bottom: 6px; }

.onecol { display: grid; grid-template-columns: minmax(0, 1fr) 420px; gap: 40px; align-items: start; }
.onecol figure { margin: 0; }
.onecol img {
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
  border-radius: 16px;
  box-shadow: 0 24px 48px -28px rgba(0, 0, 0, .85), 0 0 0 1px rgba(255, 148, 64, .2);
}

/* ── 入场动效（纯 CSS，与滚动位置无关）─────────────────── */
@keyframes shelfIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes lampOn { from { opacity: 0; transform: scale(.4); } to { opacity: 1; transform: none; } }
@keyframes halo {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 148, 64, .5); }
  55% { box-shadow: 0 0 0 8px rgba(255, 148, 64, 0); }
}
.rise { animation: shelfIn .55s cubic-bezier(.2, .7, .3, 1) both; }
.rise.d1 { animation-delay: .09s; }
.rise.d2 { animation-delay: .18s; }

@media (prefers-reduced-motion: reduce) {
  .rise, .lamp { animation: none; opacity: 1; transform: none; }
}

/* ── 断点 980 ───────────────────────────────────────────── */
@media (max-width: 980px) {
  .sec { padding: 56px 0; }
  .hero__grid { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .hero h1 { font-size: 34px; }
  .hero__shot img { max-width: 300px; }
  .facts__in { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog__grid { grid-template-columns: minmax(0, 1fr); }
  .catalog__rail { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .read__grid { grid-template-columns: minmax(0, 1fr); }
  .shots__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .onecol { grid-template-columns: minmax(0, 1fr); }

  .burger { display: block; }
  .nav {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 4vw 14px;
    background: var(--bg2);
    border-bottom: 1px solid var(--line);
  }
  .burger[aria-expanded="true"] ~ .nav { display: flex; }
}

/* ── 断点 620 ───────────────────────────────────────────── */
@media (max-width: 620px) {
  .sec { padding: 44px 0; }
  .hero__in { padding: 40px 0 56px; }
  .hero h1 { font-size: 28px; }
  .h2 { font-size: 21px; }
  .hero__acts .btn { width: 100%; }
  .facts__in { grid-template-columns: minmax(0, 1fr); margin-top: -20px; }
  .cards, .xentry, .voices, .phones { grid-template-columns: minmax(0, 1fr); }
  .shots__grid { grid-template-columns: minmax(0, 1fr); }
  .catalog__rail { grid-template-columns: minmax(0, 1fr); }
  .brand__name { font-size: 18px; }
  .btn--sm { padding: 8px 14px; font-size: 13px; }
  .step { grid-template-columns: 42px minmax(0, 1fr); }
}