/* ============================================================
   吉林市同益科技开发有限公司 · 门户网站
   设计语言：「公文纸墨」—— 纸面为底、墨字为骨、朱印为睛
   与「秒转」印章纸墨同源，门户更偏红头公文的编辑气质
   无外部字体 / 图标 / 图片依赖，全部本地渲染
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 纸与墨 */
  --paper:        #f5f1e8;
  --paper-2:      #ede7d9;
  --paper-3:      #e5ddcb;
  --ink:          #23261e;
  --ink-soft:     #4a4d42;
  --muted:        #77745f;
  /* 藏青为骨，朱砂点睛 */
  --indigo:       #1e3a52;
  --indigo-deep:  #14283a;
  --cinnabar:     #b4402a;
  --cinnabar-2:   #8f2f1d;
  --ochre:        #a07a2c;
  /* 线与影 */
  --line:         rgba(35, 38, 30, .16);
  --line-strong:  rgba(35, 38, 30, .38);
  --shadow-1:     0 1px 0 rgba(35, 38, 30, .06), 0 10px 28px -18px rgba(20, 30, 45, .28);
  --shadow-2:     0 2px 0 rgba(35, 38, 30, .05), 0 24px 48px -24px rgba(20, 30, 45, .35);
  /* 字体 */
  --f-serif: "Noto Serif SC", "Source Han Serif SC", "STZhongsong", "SimSun", "Songti SC", serif;
  --f-sans:  "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", sans-serif;
  --f-mono:  "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
  /* 节奏 */
  --w: 1180px;
  --pad: clamp(20px, 4vw, 48px);
  --ease: cubic-bezier(.22, .8, .28, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--f-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  /* 纸面颗粒与稿纸竖线 */
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .04 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E"),
    repeating-linear-gradient(90deg, transparent 0 calc(100% / 24 - 1px), var(--line) calc(100% / 24 - 1px) calc(100% / 24));
  background-attachment: fixed;
}

::selection { background: rgba(180, 64, 42, .22); }

a { color: inherit; text-decoration: none; }
img, svg { display: block; }
button { font-family: inherit; cursor: pointer; }

.wrap { width: min(var(--w), 100% - var(--pad) * 2); margin-inline: auto; }

/* 竖排文字 */
.v-text {
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: .5em;
}

/* ---------- 红头双线（全站签名分隔） ---------- */
.doc-rule {
  border: 0;
  height: 0;
  border-top: 3px solid var(--cinnabar);
  border-bottom: 1px solid var(--cinnabar);
  padding-top: 2px;
}
.doc-rule.thin {
  border-top-width: 1px;
  padding-top: 3px;
  border-color: var(--line-strong);
  border-bottom-color: var(--line);
}

/* ---------- 顶部导航 ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(245, 241, 232, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand .seal { width: 44px; height: 44px; }
.brand .name {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: .08em;
  line-height: 1.25;
}
.brand .name small {
  display: block;
  font-family: var(--f-mono);
  font-weight: 400;
  font-size: 10px;
  letter-spacing: .28em;
  color: var(--muted);
  text-transform: uppercase;
}

.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--ink-soft);
  transition: color .25s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 4px;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover, .nav a.on { color: var(--ink); }
.nav a:hover::after, .nav a.on::after { transform: scaleX(1); }

.head-cta {
  flex-shrink: 0;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 9px 20px;
  font-size: 14px;
  letter-spacing: .14em;
  transition: background .25s, color .25s, border-color .25s;
}
.head-cta:hover { background: var(--cinnabar); border-color: var(--cinnabar); color: #fff; }

.burger {
  display: none;
  margin-left: auto;
  width: 42px; height: 42px;
  border: 1px solid var(--line-strong);
  background: transparent;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.burger i { width: 18px; height: 2px; background: var(--ink); transition: transform .3s var(--ease), opacity .3s; }
.burger.open i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open i:nth-child(2) { opacity: 0; }
.burger.open i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .burger { display: flex; }
  .nav {
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 12px var(--pad) 20px;
    gap: 2px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform .3s var(--ease), opacity .3s var(--ease);
  }
  .nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .head-cta { display: none; }
}

/* ---------- 页首横幅（内页） ---------- */
.page-hero {
  position: relative;
  padding: clamp(56px, 9vw, 96px) 0 clamp(40px, 6vw, 64px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.page-hero .wrap { position: relative; }
.crumb {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.crumb b { color: var(--cinnabar); font-weight: 400; }
.page-hero h1 {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 52px);
  letter-spacing: .06em;
  line-height: 1.3;
}
.page-hero .lede {
  margin-top: 18px;
  max-width: 640px;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.6vw, 17px);
}
/* 页首右侧竖排装饰 */
.page-hero .side-note {
  position: absolute;
  right: 0; top: 8px;
  font-family: var(--f-serif);
  color: var(--muted);
  font-size: 14px;
  opacity: .75;
}
@media (max-width: 720px) { .page-hero .side-note { display: none; } }

/* ---------- 章节头 ---------- */
.sec { padding: clamp(64px, 9vw, 112px) 0; position: relative; }
.sec + .sec { border-top: 1px solid var(--line); }
.sec-head { display: flex; align-items: flex-end; gap: 24px; margin-bottom: clamp(32px, 5vw, 56px); }
.sec-no {
  font-family: var(--f-serif);
  font-size: clamp(44px, 6vw, 72px);
  line-height: .9;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--cinnabar);
  flex-shrink: 0;
}
.sec-title h2 {
  font-family: var(--f-serif);
  font-size: clamp(24px, 3.4vw, 36px);
  letter-spacing: .1em;
  font-weight: 700;
}
.sec-title .sub {
  margin-top: 8px;
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
}
.sec-head .rule { flex: 1; align-self: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  font-size: 15px;
  letter-spacing: .16em;
  border: 1px solid var(--ink);
  transition: all .28s var(--ease);
  position: relative;
}
.btn .arr { transition: transform .28s var(--ease); font-family: var(--f-mono); }
.btn:hover .arr { transform: translateX(5px); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--cinnabar); border-color: var(--cinnabar); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-red { background: var(--cinnabar); border-color: var(--cinnabar); color: #fff; }
.btn-red:hover { background: var(--cinnabar-2); border-color: var(--cinnabar-2); }

/* ---------- 首页 Hero ---------- */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  padding-top: clamp(56px, 9vw, 110px);
  padding-bottom: clamp(56px, 9vw, 110px);
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--cinnabar);
  margin-bottom: 26px;
}
.hero-eyebrow::before { content: ""; width: 36px; height: 1px; background: var(--cinnabar); }
.hero h1 {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.32;
  letter-spacing: .05em;
}
.hero h1 em {
  font-style: normal;
  color: var(--cinnabar);
  position: relative;
  white-space: nowrap;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 10px;
  background: rgba(180, 64, 42, .14);
  z-index: -1;
}
.hero .lede {
  margin-top: 26px;
  max-width: 560px;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.7vw, 17.5px);
}
.hero .acts { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }

/* Hero 右侧：大印 */
.hero-stamp {
  position: relative;
  width: clamp(200px, 24vw, 300px);
  aspect-ratio: 1;
  flex-shrink: 0;
}
.hero-stamp .seal-large {
  width: 100%; height: 100%;
  animation: stamp-in .9s var(--ease) both .35s;
  filter: drop-shadow(0 18px 30px rgba(180, 64, 42, .25));
}
@keyframes stamp-in {
  0%   { opacity: 0; transform: scale(1.7) rotate(-14deg); }
  60%  { opacity: 1; transform: scale(.96) rotate(2deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}
.hero-stamp .vert {
  position: absolute;
  left: -34px; top: 0;
  font-family: var(--f-serif);
  font-size: 15px;
  color: var(--muted);
  height: 100%;
  display: flex;
  align-items: flex-start;
  opacity: 0;
  animation: fade-up .8s var(--ease) both 1s;
}
.hero-stamp .corner {
  position: absolute;
  right: -14px; bottom: -20px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--muted);
  opacity: 0;
  animation: fade-up .8s var(--ease) both 1.15s;
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* Hero 数字带 */
.hero-stats {
  border-top: 1px solid var(--line);
  background: rgba(237, 231, 217, .55);
}
.hero-stats .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 26px 8px 24px;
  text-align: center;
  position: relative;
}
.stat + .stat::before {
  content: "";
  position: absolute; left: 0; top: 22%; bottom: 22%;
  width: 1px; background: var(--line);
}
.stat b {
  display: block;
  font-family: var(--f-serif);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--indigo);
  letter-spacing: .04em;
}
.stat span {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .12em;
}
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-stamp { width: 180px; justify-self: end; margin-top: -20px; }
  .hero-stats .wrap { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
}

/* ---------- 能力四柱 ---------- */
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.pillar {
  background: var(--paper);
  padding: clamp(26px, 3vw, 40px) clamp(20px, 2.4vw, 30px);
  position: relative;
  transition: background .3s var(--ease);
}
.pillar:hover { background: #fbf8f1; }
.pillar .no {
  font-family: var(--f-serif);
  font-size: 15px;
  color: var(--cinnabar);
  letter-spacing: .2em;
}
.pillar h3 {
  font-family: var(--f-serif);
  font-size: clamp(19px, 2vw, 23px);
  letter-spacing: .1em;
  margin: 14px 0 12px;
}
.pillar p { font-size: 14px; color: var(--ink-soft); line-height: 1.9; }
.pillar .tag {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  padding: 3px 10px;
}
@media (max-width: 960px) { .pillars { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .pillars { grid-template-columns: 1fr; } }

/* ---------- 卷宗产品卡 ---------- */
.dossiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.dossier {
  position: relative;
  border: 1px solid var(--line-strong);
  background: #fbf8f1;
  padding: 30px 28px 26px;
  box-shadow: var(--shadow-1);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.dossier::before {
  /* 左侧朱线，如卷宗侧签 */
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--cinnabar);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .35s var(--ease);
}
.dossier:hover { transform: translateY(-6px); box-shadow: var(--shadow-2); }
.dossier:hover::before { transform: scaleY(1); }
.dossier .code {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--muted);
}
.dossier h3 {
  font-family: var(--f-serif);
  font-size: 23px;
  letter-spacing: .08em;
  margin: 10px 0 4px;
}
.dossier .en {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--ochre);
}
.dossier p { margin-top: 16px; font-size: 14px; color: var(--ink-soft); flex: 1; }
.dossier .feats { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.dossier .feats i {
  font-style: normal;
  font-size: 12px;
  padding: 3px 9px;
  background: rgba(30, 58, 82, .07);
  color: var(--indigo);
  letter-spacing: .06em;
}
.dossier .go {
  margin-top: 22px;
  font-size: 13.5px;
  letter-spacing: .14em;
  color: var(--cinnabar);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.dossier .go::after { content: "→"; font-family: var(--f-mono); transition: transform .3s var(--ease); }
.dossier:hover .go::after { transform: translateX(5px); }
.dossier.wide { grid-column: span 1; }
.dossiers.quad { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 960px) { .dossiers { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .dossiers, .dossiers.quad { grid-template-columns: 1fr; } }

/* ---------- 跑马灯 ---------- */
.ticker {
  border-block: 1px solid var(--line);
  background: var(--indigo-deep);
  color: var(--paper);
  overflow: hidden;
  padding: 15px 0;
}
.ticker .belt {
  display: flex;
  width: max-content;
  animation: belt 30s linear infinite;
}
.ticker:hover .belt { animation-play-state: paused; }
.ticker span {
  font-family: var(--f-serif);
  font-size: 15px;
  letter-spacing: .3em;
  padding: 0 28px;
  white-space: nowrap;
  position: relative;
}
.ticker span::after {
  content: "·";
  position: absolute;
  right: -4px;
  color: var(--cinnabar);
  background: none;
}
@keyframes belt { to { transform: translateX(-50%); } }

/* ---------- 解决方案列表（公文章节式） ---------- */
.doc-list { border-top: 1px solid var(--line-strong); }
.doc-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1.1fr) minmax(0, 1.6fr) auto;
  gap: clamp(16px, 3vw, 40px);
  align-items: center;
  padding: clamp(24px, 3.4vw, 38px) 6px;
  border-bottom: 1px solid var(--line);
  transition: background .3s var(--ease), padding-left .3s var(--ease);
}
.doc-item:hover { background: #f9f5ec; padding-left: 16px; }
.doc-item .no {
  font-family: var(--f-serif);
  font-size: 30px;
  color: var(--cinnabar);
  letter-spacing: .1em;
}
.doc-item h3 {
  font-family: var(--f-serif);
  font-size: clamp(19px, 2.2vw, 24px);
  letter-spacing: .08em;
}
.doc-item .en { font-family: var(--f-mono); font-size: 11px; letter-spacing: .2em; color: var(--muted); margin-top: 4px; }
.doc-item p { font-size: 14px; color: var(--ink-soft); }
.doc-item .arr {
  font-family: var(--f-mono);
  font-size: 18px;
  color: var(--muted);
  transition: transform .3s var(--ease), color .3s;
}
.doc-item:hover .arr { transform: translateX(6px); color: var(--cinnabar); }
@media (max-width: 860px) {
  .doc-item { grid-template-columns: 56px 1fr auto; }
  .doc-item p { display: none; }
}

/* ---------- 发展路径 ---------- */
.path { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: stage; }
.stage { padding: 34px 26px; border-left: 1px solid var(--line); position: relative; }
.stage:first-child { border-left: 0; padding-left: 0; }
.stage .dot {
  width: 12px; height: 12px;
  background: var(--cinnabar);
  transform: rotate(45deg);
  margin-bottom: 20px;
}
.stage h3 { font-family: var(--f-serif); font-size: 21px; letter-spacing: .12em; }
.stage .yr { font-family: var(--f-mono); font-size: 11px; letter-spacing: .24em; color: var(--muted); margin-top: 6px; }
.stage p { margin-top: 14px; font-size: 13.5px; color: var(--ink-soft); line-height: 1.9; }
@media (max-width: 860px) {
  .path { grid-template-columns: repeat(2, 1fr); }
  .stage:nth-child(3) { border-left: 0; padding-left: 0; }
}
@media (max-width: 520px) { .path { grid-template-columns: 1fr; } .stage { border-left: 0; padding-left: 0; border-top: 1px dashed var(--line); } .stage:first-child { border-top: 0; } }

/* ---------- CTA 带 ---------- */
.cta-band { background: var(--indigo-deep); color: var(--paper); position: relative; overflow: hidden; }
.cta-band .wrap { padding-top: clamp(60px, 8vw, 96px); padding-bottom: clamp(60px, 8vw, 96px); position: relative; z-index: 1; }
.cta-band h2 {
  font-family: var(--f-serif);
  font-size: clamp(26px, 4vw, 44px);
  letter-spacing: .1em;
  font-weight: 700;
  line-height: 1.4;
}
.cta-band p { margin-top: 16px; color: rgba(245, 241, 232, .72); max-width: 560px; }
.cta-band .acts { margin-top: 36px; display: flex; gap: 16px; flex-wrap: wrap; }
.cta-band .btn-ghost { color: var(--paper); border-color: rgba(245, 241, 232, .5); }
.cta-band .btn-ghost:hover { background: var(--paper); color: var(--indigo-deep); }
.cta-band .big-seal {
  position: absolute;
  right: -60px; top: 50%;
  transform: translateY(-50%) rotate(12deg);
  width: 320px; height: 320px;
  opacity: .1;
  pointer-events: none;
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(90deg, transparent 0 119px, rgba(245,241,232,.05) 119px 120px);
}

/* ---------- 页脚 ---------- */
.site-foot { background: var(--ink); color: rgba(245, 241, 232, .82); }
.foot-top {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(48px, 6vw, 72px) 0 44px;
}
.foot-brand .seal { width: 46px; height: 46px; margin-bottom: 16px; }
.foot-brand h3 { font-family: var(--f-serif); font-size: 19px; letter-spacing: .1em; color: var(--paper); }
.foot-brand p { margin-top: 12px; font-size: 13px; color: rgba(245, 241, 232, .55); line-height: 1.9; }
.foot-col h4 {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--cinnabar);
  margin-bottom: 18px;
  font-weight: 400;
}
.foot-col a, .foot-col span { display: block; font-size: 14px; padding: 5px 0; color: rgba(245, 241, 232, .72); transition: color .25s; }
.foot-col a:hover { color: #fff; }
.foot-bar { border-top: 1px solid rgba(245, 241, 232, .14); padding: 20px 0; }
.foot-bar .wrap {
  display: flex; flex-wrap: wrap; gap: 10px 28px;
  justify-content: space-between;
  font-size: 12.5px;
  color: rgba(245, 241, 232, .45);
  letter-spacing: .06em;
}
.foot-bar .icp { font-family: var(--f-mono); }
.foot-bar a.icp { color: inherit; text-decoration: none; transition: color .25s; }
.foot-bar a.icp:hover { color: #fff; }
@media (max-width: 860px) { .foot-top { grid-template-columns: 1fr 1fr; } }

/* ---------- 产品详情页 ---------- */
.prod {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: clamp(28px, 5vw, 64px);
  padding: clamp(56px, 8vw, 96px) 0;
  border-top: 1px solid var(--line);
}
.prod:first-of-type { border-top: 0; padding-top: 0; }
.prod .code {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .26em;
  color: var(--cinnabar);
}
.prod h2 {
  font-family: var(--f-serif);
  font-size: clamp(26px, 3.6vw, 40px);
  letter-spacing: .08em;
  margin: 12px 0 6px;
}
.prod .en { font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .16em; color: var(--ochre); }
.prod .desc { margin-top: 20px; color: var(--ink-soft); font-size: 15.5px; }
.prod ul.feats { margin-top: 26px; list-style: none; border-top: 1px solid var(--line); }
.prod ul.feats li {
  display: flex;
  gap: 14px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--ink-soft);
}
.prod ul.feats li b {
  font-family: var(--f-mono);
  font-weight: 400;
  font-size: 12px;
  color: var(--cinnabar);
  flex-shrink: 0;
  padding-top: 3px;
  letter-spacing: .1em;
}
.prod .spec {
  border: 1px solid var(--line-strong);
  background: #fbf8f1;
  box-shadow: var(--shadow-1);
  align-self: start;
  position: sticky;
  top: 96px;
}
.prod .spec h3 {
  font-family: var(--f-serif);
  font-size: 16px;
  letter-spacing: .2em;
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
  color: var(--indigo);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.prod .spec h3::after { content: " specifications"; font-family: var(--f-mono); font-size: 10px; letter-spacing: .2em; color: var(--muted); }
.prod .spec dl { padding: 10px 22px 18px; }
.prod .spec .row { display: flex; justify-content: space-between; gap: 18px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; }
.prod .spec .row:last-child { border-bottom: 0; }
.prod .spec dt { color: var(--muted); flex-shrink: 0; }
.prod .spec dd { text-align: right; color: var(--ink); }
.prod .spec .fit { padding: 16px 22px 22px; border-top: 1px solid var(--line); }
.prod .spec .fit h4 { font-size: 13px; letter-spacing: .2em; color: var(--cinnabar); margin-bottom: 10px; font-weight: 600; }
.prod .spec .fit p { font-size: 13px; color: var(--ink-soft); line-height: 1.9; }
@media (max-width: 900px) {
  .prod { grid-template-columns: 1fr; }
  .prod .spec { position: static; }
}

/* ---------- 方案详情卡 ---------- */
.sol {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(44px, 6vw, 72px) 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.sol:first-of-type { border-top: 0; padding-top: 0; }
.sol .no-line { display: flex; align-items: center; gap: 16px; }
.sol .no-line .no { font-family: var(--f-serif); font-size: 34px; color: var(--cinnabar); }
.sol .no-line .rule { flex: 1; }
.sol h2 { font-family: var(--f-serif); font-size: clamp(23px, 3vw, 32px); letter-spacing: .08em; margin-top: 16px; }
.sol .pain {
  margin-top: 18px;
  padding: 16px 20px;
  background: rgba(180, 64, 42, .06);
  border-left: 3px solid var(--cinnabar);
  font-size: 14px;
  color: var(--ink-soft);
}
.sol .pain b { color: var(--cinnabar); font-weight: 600; letter-spacing: .1em; }
.sol .compose { margin-top: 22px; }
.sol .compose h4 { font-size: 13px; letter-spacing: .24em; color: var(--indigo); margin-bottom: 12px; }
.sol .compose .chips { display: flex; flex-wrap: wrap; gap: 8px; }
.sol .compose .chips i {
  font-style: normal;
  font-size: 12.5px;
  padding: 5px 12px;
  border: 1px solid var(--line-strong);
  background: #fbf8f1;
  letter-spacing: .08em;
}
.sol .deliver { border: 1px solid var(--line-strong); background: #fbf8f1; box-shadow: var(--shadow-1); }
.sol .deliver h4 {
  font-family: var(--f-serif);
  padding: 15px 22px;
  font-size: 15px;
  letter-spacing: .18em;
  border-bottom: 1px solid var(--line);
  color: var(--indigo);
}
.sol .deliver ol { list-style: none; counter-reset: d; padding: 8px 22px 16px; }
.sol .deliver ol li {
  counter-increment: d;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 13.5px;
  color: var(--ink-soft);
  display: flex; gap: 12px;
}
.sol .deliver ol li:last-child { border-bottom: 0; }
.sol .deliver ol li::before {
  content: counter(d, cjk-ideographic);
  font-family: var(--f-serif);
  color: var(--cinnabar);
  flex-shrink: 0;
  padding-top: 1px;
}
@media (max-width: 860px) { .sol { grid-template-columns: 1fr; } }

/* ---------- 关于页 ---------- */
.about-prose {
  columns: 1;
  max-width: 760px;
  font-size: 16px;
  line-height: 2.1;
  color: var(--ink-soft);
}
.about-prose p + p { margin-top: 1.2em; }
.about-prose .drop {
  float: left;
  font-family: var(--f-serif);
  font-size: 64px;
  line-height: .9;
  color: var(--cinnabar);
  padding: 6px 14px 0 0;
}
.motto-band {
  background: var(--indigo-deep);
  color: var(--paper);
  text-align: center;
  padding: clamp(48px, 7vw, 80px) var(--pad);
  position: relative;
  overflow: hidden;
}
.motto-band blockquote {
  font-family: var(--f-serif);
  font-size: clamp(22px, 3.4vw, 34px);
  letter-spacing: .18em;
  font-weight: 700;
}
.motto-band cite {
  display: block;
  margin-top: 18px;
  font-style: normal;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: rgba(245, 241, 232, .55);
}
.motto-band .deco {
  position: absolute;
  font-family: var(--f-serif);
  font-size: 150px;
  color: rgba(245, 241, 232, .04);
  user-select: none;
  line-height: 1;
}
.motto-band .deco.l { left: 4%; top: 50%; transform: translateY(-50%); }
.motto-band .deco.r { right: 4%; top: 50%; transform: translateY(-50%); }

.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.value {
  border: 1px solid var(--line-strong);
  background: #fbf8f1;
  padding: 30px 30px 26px;
  box-shadow: var(--shadow-1);
  position: relative;
}
.value .glyph {
  font-family: var(--f-serif);
  font-size: 40px;
  color: var(--cinnabar);
  line-height: 1;
}
.value h3 { font-family: var(--f-serif); font-size: 20px; letter-spacing: .12em; margin-top: 16px; }
.value p { margin-top: 10px; font-size: 14px; color: var(--ink-soft); line-height: 1.9; }
@media (max-width: 720px) { .value-grid { grid-template-columns: 1fr; } }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.info-card { border: 1px solid var(--line-strong); background: #fbf8f1; box-shadow: var(--shadow-1); }
.info-card .row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 16px;
  padding: 20px 26px;
  border-bottom: 1px dashed var(--line);
  align-items: baseline;
}
.info-card .row:last-child { border-bottom: 0; }
.info-card .k { font-family: var(--f-mono); font-size: 11px; letter-spacing: .26em; color: var(--muted); text-transform: uppercase; }
.info-card .v { font-size: 15px; color: var(--ink); }
.info-card .v small { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }
.steps { counter-reset: s; margin-top: 8px; }
.step {
  counter-increment: s;
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.step::before {
  content: counter(s, cjk-ideographic);
  font-family: var(--f-serif);
  font-size: 26px;
  color: var(--cinnabar);
  line-height: 1.2;
}
.step h3 { font-family: var(--f-serif); font-size: 18px; letter-spacing: .12em; }
.step p { margin-top: 6px; font-size: 13.5px; color: var(--ink-soft); }

.form-shell { border: 1px solid var(--line-strong); background: #fbf8f1; box-shadow: var(--shadow-2); }
.form-shell .form-head {
  padding: 22px 30px;
  border-bottom: 3px solid var(--cinnabar);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.form-shell .form-head h3 { font-family: var(--f-serif); font-size: 20px; letter-spacing: .14em; }
.form-shell .form-head span { font-family: var(--f-mono); font-size: 11px; letter-spacing: .2em; color: var(--muted); }
.form-body { padding: 28px 30px 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; letter-spacing: .14em; color: var(--ink-soft); }
.field label i { color: var(--cinnabar); font-style: normal; margin-left: 2px; }
.field input, .field select, .field textarea {
  font-family: inherit;
  font-size: 14.5px;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  outline: none;
  transition: border-color .25s, box-shadow .25s;
  border-radius: 0;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--cinnabar);
  box-shadow: 0 0 0 3px rgba(180, 64, 42, .12);
}
.field textarea { resize: vertical; min-height: 120px; }
.form-foot { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.form-foot .note { font-size: 12px; color: var(--muted); }
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-body { grid-template-columns: 1fr; }
}
.toast {
  position: fixed;
  left: 50%; bottom: 34px;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--paper);
  padding: 14px 26px;
  font-size: 14px;
  letter-spacing: .1em;
  box-shadow: var(--shadow-2);
  opacity: 0;
  pointer-events: none;
  transition: all .35s var(--ease);
  z-index: 99;
  border-left: 3px solid var(--cinnabar);
}
.toast.show { opacity: 1; transform: translateX(-50%); }

/* ---------- 版本徽标（演示数据） ---------- */
.ver {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cinnabar);
  border: 1px solid rgba(180, 64, 42, .45);
  padding: 2px 8px;
  border-radius: 2px;
  background: rgba(180, 64, 42, .06);
}

/* ---------- 落地项目名录（卷宗索引） ---------- */
.registry { border-top: 2px solid var(--line-strong); margin-top: clamp(30px, 4vw, 44px); }
.registry-head { display: flex; justify-content: space-between; align-items: baseline; padding: 16px 2px 8px; flex-wrap: wrap; gap: 8px; }
.registry-head b { font-family: var(--f-serif); font-size: 18px; letter-spacing: .18em; color: var(--indigo); }
.registry-head span { font-family: var(--f-mono); font-size: 11px; letter-spacing: .2em; color: var(--muted); }
.registry ol { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; }
.registry li { display: flex; gap: 14px; align-items: baseline; padding: 11px 2px; border-bottom: 1px dashed var(--line); font-size: 14px; }
.registry li b { font-family: var(--f-mono); font-weight: 400; font-size: 11px; color: var(--cinnabar); letter-spacing: .12em; flex-shrink: 0; width: 62px; }
.registry li span.line { margin-left: auto; color: var(--muted); font-size: 12px; flex-shrink: 0; letter-spacing: .08em; }
@media (max-width: 720px) { .registry ol { grid-template-columns: 1fr; } }

/* ---------- 红头对照表 ---------- */
.sheet-wrap { overflow-x: auto; }
.sheet { width: 100%; border-collapse: collapse; background: #fbf8f1; box-shadow: var(--shadow-1); }
.sheet th {
  background: var(--indigo-deep);
  color: var(--paper);
  font-family: var(--f-serif);
  font-weight: 700;
  letter-spacing: .14em;
  padding: 14px 18px;
  text-align: left;
  font-size: 14.5px;
  border-bottom: 3px solid var(--cinnabar);
  white-space: nowrap;
}
.sheet td { padding: 13px 18px; border-bottom: 1px solid var(--line); font-size: 14px; color: var(--ink-soft); vertical-align: top; }
.sheet td b { color: var(--ink); font-family: var(--f-serif); letter-spacing: .06em; font-size: 15px; }
.sheet tbody tr:hover td { background: #f6f1e6; }

/* ---------- 常见问题（公文问答） ---------- */
.faq { border-top: 1px solid var(--line-strong); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; display: flex; gap: 18px; align-items: baseline; padding: 22px 6px; font-family: var(--f-serif); font-size: clamp(16px, 2vw, 19px); letter-spacing: .06em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .q { font-family: var(--f-serif); color: var(--cinnabar); flex-shrink: 0; letter-spacing: .1em; }
.faq summary .mk { margin-left: auto; font-family: var(--f-mono); color: var(--muted); transition: transform .3s var(--ease); }
.faq details[open] summary .mk { transform: rotate(45deg); }
.faq details[open] summary { color: var(--indigo); }
.faq .a { padding: 0 6px 24px 46px; color: var(--ink-soft); font-size: 14.5px; line-height: 1.95; max-width: 820px; }
@media (max-width: 560px) { .faq .a { padding-left: 6px; } }

/* ---------- 静态公文章节（无链接） ---------- */
.doc-item.static { cursor: default; }
.doc-item.static:hover { background: transparent; padding-left: 6px; }
.doc-item.static .arr { visibility: hidden; }

/* ---------- 滚动显现 ---------- */
.rv { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.rv.in { opacity: 1; transform: none; }
.rv.d1 { transition-delay: .1s; }
.rv.d2 { transition-delay: .2s; }
.rv.d3 { transition-delay: .3s; }
.rv.d4 { transition-delay: .4s; }
@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  .hero-stamp .seal-large { animation: none; }
  .ticker .belt { animation: none; }
}

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 46px; height: 46px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 16px;
  box-shadow: var(--shadow-1);
  opacity: 0;
  pointer-events: none;
  transition: all .3s var(--ease);
  z-index: 80;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { background: var(--cinnabar); border-color: var(--cinnabar); color: #fff; }