/* ==========================================================================
   樱花漫画 · yhmhapp.org.cn
   视觉方向 B9「霓虹都市」：深空靛蓝底 + 霓虹紫 / 电光蓝点缀
   渲染语言（第 14 种）：切角 + 霓虹发丝描边 + 内发光
   布局骨架（第 14 种）：作品入口楼层（左入口轴 / 右作品轨道）
   动效机制（第 14 种）：纯 CSS @keyframes neonFlicker + gridDrift
   ========================================================================== */

:root {
  --navy: #070C22;
  --navy2: #0B1233;
  --card: #101A3D;
  --card2: #16224D;
  --violet: #A259FF;
  --violet-d: #7233CC;
  --violet-l: #E3D0FF;
  --elec: #35C8FF;
  --elec-d: #1B95CC;
  --elec-l: #CDF0FF;
  --tx: #EAF0FF;
  --tx2: #A6B6D8;
  --tx3: #7C8FB8;
  --hair: rgba(162, 89, 255, .30);
  --hair2: rgba(53, 200, 255, .28);
  --cut: 14px;
  --wrap: 1180px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--navy);
  color: var(--tx);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  background-image:
    radial-gradient(760px 420px at 8% -6%, rgba(162, 89, 255, .20), transparent 68%),
    radial-gradient(680px 400px at 100% 4%, rgba(53, 200, 255, .14), transparent 66%);
  background-repeat: no-repeat;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--elec); text-decoration: none; }
a:hover { color: var(--violet-l); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }

/* ---------- 切角渲染语言 ---------- */
.cut {
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

/* 霓虹发丝描边：外层渐变当 1px 边，内层实底 */
.panel {
  --cut: 18px;
  background: linear-gradient(140deg, rgba(162, 89, 255, .62), rgba(53, 200, 255, .42));
  padding: 1px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.panel__in {
  background: var(--card);
  height: 100%;
  padding: 22px 24px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

/* ---------- 入场动效：纯 CSS，与滚动位置无关 ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
.rise { animation: rise .55s cubic-bezier(.2, .7, .3, 1) both; }
.rise.d1 { animation-delay: .07s; }
.rise.d2 { animation-delay: .14s; }
.rise.d3 { animation-delay: .21s; }

@keyframes neonFlicker {
  0%, 100% { opacity: .95; }
  46% { opacity: .95; }
  48% { opacity: .45; }
  50% { opacity: .95; }
  71% { opacity: .95; }
  73% { opacity: .58; }
  75% { opacity: .95; }
}
@keyframes gridDrift {
  from { background-position: 0 0, 0 0; }
  to   { background-position: 0 34px, 34px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .rise { animation: none; opacity: 1; transform: none; }
  .hero::after, .hero::before, .band, .h2no { animation: none !important; }
}

/* ---------- 导航 ---------- */
.top {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(7, 12, 34, .97);
  border-bottom: 1px solid rgba(162, 89, 255, .22);
  backdrop-filter: blur(8px);
}
.top__in {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 68px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.brand__logo { width: 42px; height: 42px; border-radius: 11px; }
.brand__name { font-size: 19px; font-weight: 700; letter-spacing: .5px; color: var(--tx); }
.brand__name b { color: var(--violet-l); font-weight: 700; }

.menu { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.menu a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--tx2);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 9px 100%, 0 calc(100% - 9px));
}
.menu a:hover { background: rgba(162, 89, 255, .16); color: var(--tx); }
.menu a.on { background: rgba(53, 200, 255, .18); color: var(--elec-l); }

.btn {
  --cut: 11px;
  display: inline-block;
  position: relative;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 700;
  color: #0A0620;
  background: linear-gradient(100deg, var(--violet), var(--elec));
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.btn:hover { color: #0A0620; filter: brightness(1.08); }
.btn::after {
  content: "";
  position: absolute;
  left: 10%; right: 10%; bottom: 3px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .9), transparent);
}
.btn__dot {
  display: inline-block;
  width: 7px; height: 7px;
  margin-right: 9px;
  border-radius: 50%;
  background: var(--elec-l);
  vertical-align: 2px;
}
.top .btn { padding: 10px 20px; font-size: 14px; }

.burger {
  display: none;
  width: 50px; height: 38px;
  padding: 0;
  white-space: nowrap;
  border: 1px solid var(--hair);
  background: transparent;
  color: var(--tx);
  font-size: 17px;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 9px 100%, 0 calc(100% - 9px));
}

/* ---------- Hero：左文右图 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 58px 0 66px;
  background:
    radial-gradient(560px 320px at 12% 22%, rgba(162, 89, 255, .34), transparent 70%),
    radial-gradient(520px 300px at 96% 8%, rgba(53, 200, 255, .26), transparent 70%),
    linear-gradient(180deg, #080E28, #060A1C);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(53, 200, 255, .085) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(162, 89, 255, .085) 0 1px, transparent 1px 34px);
  animation: gridDrift 14s linear infinite;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--violet), var(--elec), var(--violet));
  animation: neonFlicker 6s ease-in-out infinite;
}
.hero__in {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr minmax(0, 372px);
  gap: 44px;
  align-items: center;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 16px;
  padding: 6px 14px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--elec-l);
  background: rgba(53, 200, 255, .10);
  border: 1px solid var(--hair2);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
.kicker i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 10px var(--violet);
}
.hero h1 {
  margin: 0 0 18px;
  font-size: 40px;
  line-height: 1.28;
  letter-spacing: .5px;
  color: #fff;
}
.hero h1 b {
  color: var(--violet-l);
  font-weight: 700;
  text-shadow: 0 0 22px rgba(162, 89, 255, .6);
}
.hero-lead {
  margin: 0 0 24px;
  max-width: 620px;
  font-size: 16.5px;
  color: #C3D0EC;
}
.hero-acts { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.ghost {
  padding: 11px 22px;
  font-size: 15px;
  color: var(--elec-l);
  border: 1px solid var(--hair2);
  clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 11px 100%, 0 calc(100% - 11px));
}
.ghost:hover { background: rgba(53, 200, 255, .12); }

.hero__shot { margin: 0; position: relative; }
.hero__shot .panel { --cut: 20px; }
.hero__shot .panel__in {
  padding: 12px;
  background: linear-gradient(160deg, #131E48, #0A1030);
}
.hero__shot img { width: 100%; height: auto; border-radius: 10px; }
.hero__cap {
  margin: 12px 2px 0;
  font-size: 13px;
  color: var(--tx3);
  text-align: center;
}

/* ---------- 事实条 ---------- */
.facts { padding: 26px 0 8px; }
.facts__in {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: linear-gradient(90deg, rgba(162, 89, 255, .34), rgba(53, 200, 255, .30));
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}
.fact { background: var(--navy2); padding: 16px 18px; }
.fact__k { display: block; font-size: 12.5px; color: var(--tx3); letter-spacing: .06em; }
.fact__v { display: block; margin-top: 5px; font-size: 17px; font-weight: 700; color: var(--elec-l); }

/* ---------- 通用区块 ---------- */
.sec { padding: 58px 0; }
.sec--alt { background: linear-gradient(180deg, #080E26, #070C22); }

.h2row { display: flex; align-items: center; gap: 14px; margin: 0 0 12px; }
.h2no {
  --cut: 9px;
  flex: 0 0 auto;
  min-width: 42px;
  padding: 7px 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  text-align: center;
  color: #08122E;
  background: linear-gradient(120deg, var(--elec), var(--violet));
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
h2 { margin: 0; font-size: 25px; line-height: 1.35; color: #fff; }
h3 { margin: 22px 0 8px; font-size: 18px; color: var(--violet-l); }
.sub { margin: 0 0 26px; color: var(--tx2); font-size: 15.5px; }
p { margin: 0 0 14px; }

.prose p { color: #C4D1EC; }
.prose b, .prose strong { color: var(--elec-l); font-weight: 700; }
.prose a { border-bottom: 1px solid rgba(53, 200, 255, .45); }

/* ---------- 楼层：作品入口骨架 ---------- */
.floor { margin-bottom: 26px; }
.floor:last-child { margin-bottom: 0; }
.floor__axis {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.floor__no {
  flex: 0 0 auto;
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--violet-l);
  border: 1px solid var(--hair);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
.floor__name { flex: 0 0 auto; white-space: nowrap; font-size: 16.5px; font-weight: 700; color: var(--tx); }
.floor__hint { min-width: 0; font-size: 13.5px; color: var(--tx3); }

.rail {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 4px 2px 14px;
  scrollbar-width: thin;
}
.rail__item {
  flex: 0 0 216px;
  --cut: 15px;
  background: linear-gradient(150deg, rgba(162, 89, 255, .30), rgba(53, 200, 255, .18));
  padding: 1px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.rail__in {
  background: var(--card);
  padding: 16px 17px 18px;
  height: 100%;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.rail__k {
  display: inline-block;
  margin-bottom: 9px;
  padding: 3px 9px;
  font-size: 12px;
  color: var(--elec-l);
  background: rgba(53, 200, 255, .13);
  border: 1px solid var(--hair2);
}
.rail__t { display: block; font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 7px; }
.rail__d { margin: 0; font-size: 14px; color: var(--tx2); }

/* ---------- 参数对照（阅读体验） ---------- */
.tbl-cap { margin: 0 0 10px; font-size: 13.5px; color: var(--tx3); }
.tbl-scroll { overflow-x: auto; }
table { width: 100%; min-width: 560px; border-collapse: collapse; }
th, td { padding: 13px 15px; text-align: left; font-size: 15px; }
thead th {
  font-size: 14px;
  color: var(--elec-l);
  background: rgba(53, 200, 255, .12);
  border-bottom: 1px solid var(--hair2);
}
tbody td { color: #C4D1EC; border-bottom: 1px solid rgba(162, 89, 255, .16); }
tbody tr:nth-child(even) td { background: rgba(162, 89, 255, .05); }
tbody td:first-child { color: var(--tx); font-weight: 700; }
.tbl-note { margin: 12px 0 0; font-size: 13.5px; color: var(--tx3); }

/* ---------- 预览栅格 ---------- */
.shots {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.shot { margin: 0; }
.shot .panel__in { padding: 9px; }
.shot img { width: 100%; height: auto; border-radius: 8px; }
.shot figcaption { margin-top: 9px; font-size: 13px; color: var(--tx2); text-align: center; }

/* ---------- 阅读体验双栏 ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
  gap: 30px;
  align-items: start;
}
/* 图在左时用镜像列宽，避免竖屏截图铺满 1fr 轨道被放大到 1.4 倍 */
.split--rev {
  grid-template-columns: minmax(0, 330px) minmax(0, 1fr);
}
.split__list { margin: 0; padding: 0; list-style: none; }
.split__list li {
  position: relative;
  margin-bottom: 15px;
  padding-left: 20px;
  color: #C4D1EC;
}
.split__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 10px;
  width: 8px; height: 8px;
  background: var(--elec);
  box-shadow: 0 0 8px rgba(53, 200, 255, .8);
}
.split__list b { color: #fff; }

/* ---------- 步骤条 ---------- */
.steps { margin: 0; padding: 0; list-style: none; counter-reset: st; }
.steps li {
  position: relative;
  margin-bottom: 16px;
  padding: 16px 18px 16px 62px;
  background: var(--navy2);
  color: #C4D1EC;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}
.steps li::before {
  counter-increment: st;
  content: counter(st, decimal-leading-zero);
  position: absolute;
  left: 18px; top: 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--elec);
}
.steps b { color: #fff; }

/* ---------- 问题卡（FAQ） ---------- */
.qa { margin: 0 0 12px; }
.qa summary {
  cursor: pointer;
  padding: 15px 18px;
  font-size: 16px;
  font-weight: 700;
  color: var(--tx);
  background: var(--navy2);
  list-style: none;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: " +"; color: var(--elec); }
.qa[open] summary::after { content: " −"; }
.qa[open] summary { background: var(--card2); }
.qa .qa__body {
  padding: 16px 18px 4px;
  border-left: 2px solid rgba(53, 200, 255, .45);
  margin: 10px 0 0 2px;
  color: #C4D1EC;
}

/* ---------- 评价 ---------- */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.quote { --cut: 16px; }
.quote .panel__in { padding: 20px 22px; }
.quote p { color: #C4D1EC; font-size: 15px; }
.quote__by { display: block; margin-top: 10px; font-size: 13px; color: var(--tx3); }

/* ---------- 内页入口卡 ---------- */
.links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.link-card { --cut: 18px; display: block; }
.link-card .panel__in { padding: 22px 24px; transition: background .2s; }
.link-card:hover .panel__in { background: var(--card2); }
.link-card b { display: block; margin-bottom: 8px; font-size: 17px; color: #fff; }
.link-card span { font-size: 14px; color: var(--tx2); }

/* ---------- CTA ---------- */
.cta { padding: 52px 0 60px; }
.cta__in {
  --cut: 22px;
  position: relative;
  padding: 40px 34px;
  text-align: center;
  background:
    radial-gradient(420px 200px at 20% 0%, rgba(162, 89, 255, .32), transparent 70%),
    radial-gradient(420px 200px at 90% 100%, rgba(53, 200, 255, .24), transparent 70%),
    linear-gradient(150deg, #121C46, #0A1030);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut),
                     100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  border: 1px solid rgba(162, 89, 255, .30);
}
.cta__in h2 { margin-bottom: 12px; }
.cta__in p { color: var(--tx2); max-width: 620px; margin: 0 auto 22px; }
.band {
  height: 3px;
  margin: 26px auto 0;
  max-width: 460px;
  background: linear-gradient(90deg, transparent, var(--violet), var(--elec), transparent);
  animation: neonFlicker 7s ease-in-out infinite;
}

/* ---------- 内页横幅 ---------- */
.page-hero {
  padding: 46px 0 40px;
  background:
    radial-gradient(520px 260px at 10% 0%, rgba(162, 89, 255, .30), transparent 70%),
    radial-gradient(460px 240px at 94% 10%, rgba(53, 200, 255, .20), transparent 70%),
    linear-gradient(180deg, #080E28, #070C22);
  border-bottom: 1px solid rgba(162, 89, 255, .20);
}
.page-hero h1 { margin: 0 0 14px; font-size: 31px; color: #fff; }
.page-hero .hero-lead { margin: 0; }

/* ---------- 页脚 ---------- */
.foot {
  background: #05081A;
  border-top: 1px solid rgba(162, 89, 255, .22);
  padding: 40px 0 26px;
  font-size: 14px;
  color: var(--tx3);
}
.foot__in { display: grid; grid-template-columns: 1.4fr 1fr; gap: 30px; }
.foot h3 { margin: 0 0 12px; font-size: 16px; color: var(--elec-l); }
.foot ul { margin: 0; padding: 0; list-style: none; }
.foot li { margin-bottom: 8px; }
.foot a { color: var(--tx2); }
.disclaimer {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(162, 89, 255, .18);
  font-size: 13.5px;
  color: var(--tx3);
}
.copy { margin: 10px 0 0; font-size: 13px; color: #5E6E96; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero { padding: 44px 0 52px; }
  .hero__in { grid-template-columns: 1fr; gap: 30px; }
  .hero h1 { font-size: 32px; }
  .hero__shot { max-width: 340px; margin: 0 auto; }
  .facts__in { grid-template-columns: repeat(2, 1fr); }
  .shots { grid-template-columns: repeat(2, 1fr); }
  .split, .split--rev { grid-template-columns: 1fr; }
  .quotes { grid-template-columns: 1fr; }
  .links { grid-template-columns: 1fr; }
  .foot__in { grid-template-columns: 1fr; gap: 22px; }
  .page-hero h1 { font-size: 26px; }
}

@media (max-width: 620px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 16px; }
  .sec { padding: 42px 0; }
  .menu { display: none; width: 100%; }
  .menu.open { display: flex; }
  .top__in { min-height: 62px; padding: 9px 0; gap: 12px; }
  .burger { display: block; margin-left: auto; }
  .top .btn { display: none; }
  .brand__logo { width: 36px; height: 36px; }
  .brand__name { font-size: 17px; }
  .hero { padding: 34px 0 44px; }
  .hero h1 { font-size: 26px; }
  .hero-lead { font-size: 15.5px; }
  .facts__in { grid-template-columns: 1fr 1fr; }
  .fact { padding: 13px 14px; }
  .fact__v { font-size: 15px; }
  .shots { grid-template-columns: 1fr 1fr; gap: 12px; }
  .floor__axis { flex-wrap: wrap; gap: 9px 12px; }
  .floor__hint { flex: 1 1 100%; }
  h2 { font-size: 21px; }
  .h2no { min-width: 36px; padding: 6px 8px; font-size: 13px; }
  .cta__in { padding: 30px 18px; }
  .page-hero { padding: 34px 0 30px; }
  .page-hero h1 { font-size: 23px; }
  .qa summary { font-size: 15px; padding: 13px 15px; }
}