/* ============================================================
   anydoc — "排版车间 / Typesetting Studio"
   一个文档转换工具的实用主义排版界面。
   编辑基调：暖墨底 + 纸张色 + 单一橙色强调 + 大号显示字体
   ============================================================ */

/* ---------- 1. 令牌与重置 ---------- */
:root {
  --bg: #12100d;
  --bg-2: #191613;
  --panel: #1c1814;
  --panel-2: #211c17;

  --line: rgba(241, 236, 226, 0.10);
  --line-2: rgba(241, 236, 226, 0.20);

  --paper: #f1ece2;
  --paper-2: #c5beb0;
  --paper-3: #857e70;

  --accent: #e8643c;
  --accent-deep: #c64a28;
  --accent-ink: #2a1007;

  --ok: #7fae8a;
  --warn: #d9a03f;

  --font-display: 'Archivo Black', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Space Grotesk', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --r: 6px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --maxw: 1380px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--paper);
  line-height: 1.65;
  letter-spacing: -0.005em;
  overflow-x: hidden;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: #160a04; }

a { color: inherit; text-decoration: none; }

img, svg, canvas { max-width: 100%; display: block; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

/* 焦点可见环（无障碍） */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* 顶层的噪点颗粒层，塑造纸张质感 */
.noise {
  position: fixed;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
}

/* 页面顶部细网格线，文档工作台的背景氛围 */
.page-rules {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(241,236,226,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(241,236,226,0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 78%);
          mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 78%);
}

/* ---------- 2. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(4rem, 10vw, 7.5rem);
}

/* 每个版块的编辑信息：编号 + 指引线 */
.section-bar {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: clamp(2rem, 6vw, 4rem);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1rem;
}
.section-bar .num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}
.section-bar h2 {
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  font-size: clamp(1.6rem, 3.5vw, 2.7rem);
  letter-spacing: -0.01em;
  line-height: 1;
}
.section-bar .meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--paper-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: right;
}
.section-bar .ref {
  margin-left: auto;
}

@media (max-width: 640px) {
  .section-bar .meta { display: none; }
}

/* 滚动入场 */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- 3. 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  padding-block: 0.9rem;
}
.nav-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-blur {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg) 76%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
          backdrop-filter: blur(14px) saturate(1.1);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
  z-index: -1;
}
.nav.scrolled .nav-blur { border-bottom-color: var(--line); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: 1.15rem;
}
.brand .mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #16000a;
  border-radius: 4px;
  font-size: 1rem;
  transform: rotate(-4deg);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25);
  transition: transform 0.25s var(--ease-bounce);
}
.brand:hover .mark { transform: rotate(0) scale(1.06); }

.nav-links { display: flex; gap: 1.6rem; margin-left: auto; }
.nav-links a {
  position: relative;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--paper-2);
  letter-spacing: 0.01em;
  padding: 0.4rem 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-links a:hover { color: var(--paper); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav .cta {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.78rem;
  color: #16000a;
  background: var(--paper);
  padding: 0.7rem 1.1rem;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s, transform 0.15s;
}
.nav .cta:hover { background: var(--accent); color: #16000a; }
.nav .cta:active { transform: scale(0.97); }

.nav-burger {
  display: none;
  margin-left: auto;
  width: 42px; height: 42px;
  position: relative;
}
.nav-burger span {
  position: absolute; left: 11px; right: 11px; height: 2px;
  background: var(--paper); transition: transform 0.3s, opacity 0.3s;
}
.nav-burger span:nth-child(1) { top: 16px; }
.nav-burger span:nth-child(2) { top: 24px; }
.nav-burger span:nth-child(3) { top: 32px; }
.nav-burger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.4rem;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    -webkit-backdrop-filter: blur(16px);
            backdrop-filter: blur(16px);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.3s, transform 0.3s;
  }
  .nav-links.open { opacity: 1; pointer-events: auto; transform: none; }
  .nav-links a { font-family: var(--font-display); text-transform: uppercase; font-size: 1.5rem; }
  .nav .cta { display: none; }
  .nav-burger { display: block; }
}

/* ---------- 4. 首屏 Hero ---------- */
.hero {
  position: relative;
  padding-top: clamp(2.5rem, 6vw, 5rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  inset: -20% -30% auto auto;
  width: 60%;
  aspect-ratio: 1;
  background: radial-gradient(closest-side, rgba(232,100,60,0.22), transparent 72%);
  filter: blur(10px);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  position: relative;
}
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; } }

.hero .kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--paper-2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--line-2);
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 1.6rem;
}
.hero .kicker .pulse {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(127,174,138,0.5);
  animation: pulse 2.2s var(--ease) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(127,174,138,0.45); }
  70% { box-shadow: 0 0 0 9px rgba(127,174,138,0); }
  100% { box-shadow: 0 0 0 0 rgba(127,174,138,0); }
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  line-height: 0.92;
  letter-spacing: -0.02em;
  font-size: clamp(3rem, 8vw, 7.2rem);
}
.hero h1 .accent {
  color: var(--accent);
  -webkit-text-stroke: 1.5px var(--accent);
  color: transparent;
}
.hero h1 .dot { color: var(--accent); }

.hero .lede {
  margin-top: 1.8rem;
  max-width: 52ch;
  color: var(--paper-2);
  font-size: clamp(1rem, 1.7vw, 1.2rem);
  line-height: 1.7;
}
.hero .lede strong { color: var(--paper); font-weight: 600; }

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.2rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
  padding: 0.95rem 1.5rem;
  border-radius: 4px;
  transition: transform 0.15s var(--ease), background 0.2s, color 0.2s, box-shadow 0.2s;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--accent);
  color: #16000a;
  box-shadow: 0 10px 30px -12px var(--accent);
}
.btn-primary:hover { background: var(--paper); }
.btn-ghost {
  border: 1px solid var(--line-2);
  color: var(--paper);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* 数据饰带 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
  margin-top: clamp(2.4rem, 5vw, 4rem);
}
.hero-stats .stat {
  padding: 1.4rem 1rem;
  border-right: 1px solid var(--line);
}
.hero-stats .stat:last-child { border-right: none; }
.stat .big {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1;
  color: var(--paper);
}
.stat .big .unit { font-size: 0.5em; color: var(--paper-3); }
.stat .lbl {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-3);
}
@media (max-width: 720px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats .stat:nth-child(2) { border-right: none; }
  .hero-stats .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

/* 控制台卡片 —— 右侧 */
.console {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 40px 80px -40px rgba(0,0,0,0.7);
}
.console::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(255,255,255,0.04), transparent 40%);
}
.console-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.console-bar .ctl { width: 10px; height: 10px; border-radius: 50%; }
.console-bar .r { background: #ff5f57; }
.console-bar .y { background: #febc2e; }
.console-bar .g { background: #28c840; }
.console-bar .title {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--paper-3);
  letter-spacing: 0.06em;
}
.console-body {
  padding: 1.1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.9;
  color: var(--paper);
  white-space: pre;
  overflow-x: auto;
}
.console-body .c { color: var(--paper-3); }
.console-body .o { color: var(--accent); }
.console-body .b { color: var(--paper-2); font-weight: 600; }
.console-body .ok { color: var(--ok); }
.console-body .w { color: var(--warn); }
.console-tag {
  position: absolute;
  top: 3.4rem;
  right: -0.6rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--ok);
  padding: 0.3rem 0.6rem;
  border-radius: 3px;
  transform: rotate(2deg);
  box-shadow: 0 6px 16px -6px rgba(0,0,0,0.6);
}

/* ---------- 5. 跑马灯字符条 ---------- */
.marquee {
  position: relative;
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
  padding-block: 1rem;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: flex;
  gap: 2.5rem;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--paper-3);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 2.5rem;
}
.marquee-track span::after {
  content: "·";
  color: var(--accent);
  font-size: 1.4rem;
  line-height: 1;
}
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 6. 特性 (编辑列表) ---------- */
.features { border-bottom: 1px solid var(--line-2); }
.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line-2);
}
@media (max-width: 860px) { .feature-list { grid-template-columns: 1fr; } }

.feature {
  position: relative;
  padding: clamp(1.6rem, 3vw, 2.6rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  transition: background 0.3s;
}
.feature:nth-child(odd) { border-right: 1px solid var(--line); }
@media (max-width: 860px) { .feature { border-right: 0 !important; } }

.feature::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  height: 100%;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s var(--ease);
}
.feature:hover { background: var(--panel); }
.feature:hover::before { transform: scaleY(1); }

.feature .idx {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 2rem;
}
.feature h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  letter-spacing: -0.01em;
  margin-bottom: 0.7rem;
  max-width: 22ch;
}
.feature p {
  color: var(--paper-2);
  font-size: 0.92rem;
  max-width: 46ch;
}
.feature code.mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: rgba(241,236,226,0.08);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  color: var(--paper);
}

/* ---------- 7. 格式 (分栏台账) ---------- */
.formats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-2);
}
@media (max-width: 760px) { .formats-grid { grid-template-columns: 1fr; } }

.format {
  background: var(--bg-2);
  padding: clamp(1.4rem, 2.5vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background 0.25s;
}
.format:hover { background: var(--panel-2); }
.format .name {
  display: block;
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: clamp(1rem, 1.8vw, 1.3rem);
  letter-spacing: 0.01em;
}
.format .exts {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem;
}
.format .exts span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--paper-2);
  border: 1px solid var(--line-2);
  padding: 0.28rem 0.5rem;
  border-radius: 999px;
  transition: border-color 0.2s, color 0.2s;
}
.format:hover .exts span { border-color: var(--accent); color: var(--paper); }

/* ---------- 8. 快速开始 tab ---------- */
.quickstart { border-bottom: 1px solid var(--line-2); }
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  border-bottom: 1px solid var(--line-2);
  margin-bottom: 0;
}
.tab {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--paper-3);
  padding: 0.85rem 1.1rem;
  position: relative;
  transition: color 0.2s;
}
.tab::after {
  content: "";
  position: absolute;
  left: 1.1rem; right: 1.1rem; bottom: -1px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s var(--ease);
}
.tab:hover { color: var(--paper); }
.tab.active { color: var(--accent); }
.tab.active::after { transform: scaleX(1); }

.code-shell {
  background: var(--panel);
  border: 1px solid var(--line-2);
  border-top: 0;
  border-radius: 0 0 var(--r) var(--r);
  overflow: hidden;
  position: relative;
}
.code-shell .shell-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
}
.code-shell .shell-head .fname {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--paper-3);
}
.code-shell .shell-head .fname::before {
  content: "⌁ ";
  color: var(--accent);
}
.copy-btn {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--paper-3);
  border: 1px solid var(--line-2);
  padding: 0.3rem 0.65rem;
  border-radius: 3px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.copy-btn:hover { color: var(--paper); border-color: var(--accent); }
.copy-btn.copied { color: var(--ok); border-color: var(--ok); }

.code-pane {
  display: none;
  position: relative;
}
.code-pane.active { display: block; }
.code-pane pre {
  padding: 1.2rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.85;
  overflow-x: auto;
  /* 行号列 */
}
.code-pane .c { color: var(--paper-3); }
.code-pane .k { color: var(--accent); }
.code-pane .s { color: var(--warn); }
.code-pane .fn { color: var(--paper-2); }
.code-pane .n { color: var(--ok); }

.qs-note {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--paper-3);
}

/* ---------- 9. 基准测试 (台账) ---------- */
.bench { border-bottom: 1px solid var(--line-2); }
.bench-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  background: var(--bg-2);
}
table.bench {
  width: 100%;
  border-collapse: collapse;
  min-width: 780px;
  font-size: 0.85rem;
}
table.bench th {
  text-align: left;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-3);
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--line-2);
  white-space: nowrap;
}
table.bench td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--line);
  color: var(--paper-2);
  white-space: nowrap;
}
table.bench tbody tr:last-child td { border-bottom: 0; }
table.bench tbody tr { transition: background 0.2s; }
table.bench tbody tr:hover { background: rgba(255,255,255,0.02); }

table.bench .win td {
  color: var(--paper);
  background: linear-gradient(90deg, rgba(232,100,60,0.14), rgba(232,100,60,0.03));
}
table.bench .win .tool {
  font-family: var(--font-display);
  color: var(--accent);
}

/* 总分迷你条形图 */
.bar {
  display: inline-block;
  width: 54px;
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,0.08);
  vertical-align: middle;
  margin-left: 0.6rem;
  position: relative;
  overflow: hidden;
}
.bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--fill, 100%);
  height: 100%;
  border-radius: 3px;
  background: currentColor;
}

.bench-foot {
  margin-top: 1.6rem;
  display: grid;
  gap: 1.1rem;
}
.bench-foot p { color: var(--paper-3); font-size: 0.85rem; max-width: 86ch; }
.bench-foot strong { color: var(--paper-2); font-weight: 600; }

.best-for {
  margin-top: 2rem;
  border: 1px solid rgba(232,100,60,0.4);
  background: linear-gradient(120deg, rgba(232,100,60,0.12), rgba(232,100,60,0.02) 60%);
  border-radius: var(--r);
  padding: clamp(1.4rem, 3vw, 2rem);
  position: relative;
  overflow: hidden;
}
.best-for::before {
  content: "★ 最佳场景";
  position: absolute;
  top: 1rem; right: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.best-for h3 {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  margin-bottom: 0.7rem;
}
.best-for p { color: var(--paper-2); font-size: 0.92rem; max-width: 70ch; }

/* ---------- 10. 工作原理 (流水线) ---------- */
.pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-2);
}
@media (max-width: 900px) { .pipeline { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .pipeline { grid-template-columns: 1fr; } }

.step {
  background: var(--bg-2);
  padding: clamp(1.4rem, 2.5vw, 2rem);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.step .arrow {
  position: absolute;
  top: 45%;
  right: -0.75rem;
  z-index: 2;
  width: 1.5rem; height: 1.5rem;
  background: var(--accent);
  color: #16000a;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
}
@media (max-width: 900px) { .step .arrow { display: none; } }
.step .k {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: auto;
}
.step h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 0.8rem 0 0.5rem;
  letter-spacing: 0.01em;
}
.step p { color: var(--paper-2); font-size: 0.85rem; }

blockquote.ed {
  position: relative;
  margin: 0 0 2.2rem;
  padding: clamp(1.4rem, 3vw, 2rem) clamp(1.4rem, 3vw, 2.4rem);
  border-left: 3px solid var(--accent);
  background: var(--panel);
  color: var(--paper-2);
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  line-height: 1.7;
}
blockquote.ed strong { color: var(--paper); }

/* ---------- 11. 识别 / 开发 ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}
@media (max-width: 820px) { .grid-2 { grid-template-columns: 1fr; } }

.code-shell.flush {
  border-top: 1px solid var(--line-2);
  border-radius: var(--r);
}

/* ---------- 12. 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line-2);
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
  overflow: hidden;
}
.footer-word {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: clamp(3rem, 13vw, 11rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--bg-2);
  -webkit-text-stroke: 1px var(--line-2);
  user-select: none;
}
.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  color: var(--paper-3);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
}
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--paper-2);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-made {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- 13. 无障碍动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .marquee-track { animation: none; }
  .hero .kicker .pulse { animation: none; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}