/* ═══════════════════════════════════════════════
   SPORT VISSION — 量化决策终端 · 站点样式
   深色终端风格（品牌指定），单一配色模式。
   图表配色经 CVD / 对比度校验：
     #0284c7 · #199e70 · #d95926 @ surface #0f1b2d
   ═══════════════════════════════════════════════ */

:root {
  /* 表面 */
  --bg:          #080e18;
  --surface-1:   #0f1b2d;   /* 卡片 / 图表面 */
  --surface-2:   #0c1524;
  --surface-3:   #142338;

  /* 描边 */
  --line:        rgba(148, 163, 184, 0.14);
  --line-soft:   rgba(148, 163, 184, 0.08);
  --line-strong: rgba(148, 163, 184, 0.26);

  /* 文字 */
  --ink-1:       #f1f5f9;
  --ink-2:       #a3b1c6;
  --ink-3:       #6b7d95;

  /* 品牌 */
  --accent:      #38bdf8;
  --accent-2:    #0ea5e9;
  --accent-3:    #0284c7;

  /* 语义区间（已校验） */
  --zone-up:     #199e70;
  --zone-down:   #d95926;

  /* Tier 阶梯 */
  --tier-0:      #199e70;
  --tier-1:      #0284c7;
  --tier-2:      #c98500;
  --tier-3:      #d03b3b;

  /* 版式 */
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --wrap: 1180px;
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-1);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3 { line-height: 1.25; margin: 0; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
strong { color: var(--ink-1); font-weight: 650; }
em { font-style: normal; }

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

::selection { background: rgba(56, 189, 248, 0.28); color: #fff; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--accent); color: #04121d;
  padding: 10px 18px; border-radius: 0 0 var(--r-sm) 0; font-weight: 650;
}
.skip:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─────────── 导航 ─────────── */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(8, 14, 24, 0.72);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav.is-stuck {
  border-bottom-color: var(--line);
  background: rgba(8, 14, 24, 0.9);
}

.nav__inner {
  display: flex; align-items: center; gap: 28px;
  height: 68px;
}

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand__mark { width: 28px; height: 28px; border-radius: 7px; }
.brand__text {
  font-family: var(--mono);
  font-size: 14px; font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--ink-1);
}

.nav__links {
  display: flex; gap: 26px;
  margin-left: auto;
  font-size: 14px; color: var(--ink-2);
}
.nav__links a { position: relative; padding: 4px 0; transition: color 0.2s var(--ease); }
.nav__links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.28s var(--ease);
}
.nav__links a:hover { color: var(--ink-1); }
.nav__links a:hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__links a.is-active { color: var(--accent); }

.nav__toggle {
  display: none;
  width: 40px; height: 40px;
  background: none; border: 1px solid var(--line);
  border-radius: var(--r-sm); cursor: pointer;
  padding: 0; margin-left: auto;
}
.nav__toggle span {
  display: block; width: 16px; height: 1.5px;
  background: var(--ink-1); margin: 3px auto;
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(2.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-2px) rotate(-45deg); }

/* ─────────── 按钮 ─────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 14.5px; font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease),
              border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), color 0.2s var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #04121d;
  box-shadow: 0 6px 22px -8px rgba(56, 189, 248, 0.6);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -10px rgba(56, 189, 248, 0.75); }
.btn--ghost {
  border-color: var(--line-strong); color: var(--ink-1);
  background: rgba(255, 255, 255, 0.02);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn--sm { padding: 9px 17px; font-size: 13.5px; }
.btn--lg { padding: 15px 32px; font-size: 16px; }
.btn--full { width: 100%; margin-top: auto; }
.btn--tiny {
  padding: 6px 14px; font-size: 12.5px;
  border-color: var(--line); color: var(--ink-2);
  background: transparent; font-family: var(--sans);
}
.btn--tiny:hover { border-color: var(--accent); color: var(--accent); }

/* ─────────── HERO ─────────── */
.hero {
  position: relative;
  padding: 150px 0 0;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: radial-gradient(ellipse 80% 62% at 50% 22%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 62% at 50% 22%, #000 30%, transparent 78%);
  pointer-events: none;
}
.hero__glow {
  position: absolute; top: -220px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 620px;
  background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.16) 0%, transparent 68%);
  pointer-events: none;
}
.hero__inner { position: relative; text-align: center; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
}

.hero__title {
  font-size: clamp(34px, 6vw, 62px);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 26px;
}
.grad {
  background: linear-gradient(100deg, var(--accent) 10%, #7dd3fc 55%, var(--accent-2) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.hero__lede {
  max-width: 720px; margin: 0 auto 38px;
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--ink-2);
}

.hero__cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* 指标条 */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 76px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.metric {
  background: var(--surface-2);
  padding: 26px 20px;
  text-align: center;
}
.metric__val {
  display: block;
  font-family: var(--mono);
  font-size: clamp(24px, 3vw, 33px);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.metric__unit { font-size: 0.6em; color: var(--ink-2); font-weight: 500; }
.metric__label {
  display: block; margin-top: 9px;
  font-size: 12.5px; color: var(--ink-3); line-height: 1.5;
}

/* 盘口滚动条 */
.ticker {
  margin-top: 68px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--surface-2);
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker__track {
  display: flex; gap: 0;
  width: max-content;
  animation: slide 46s linear infinite;
}
@keyframes slide { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.tick {
  display: flex; align-items: baseline; gap: 9px;
  padding: 11px 24px;
  border-right: 1px solid var(--line-soft);
  font-family: var(--mono); font-size: 12.5px;
  white-space: nowrap;
}
.tick__m { color: var(--ink-3); }
.tick__h { color: var(--ink-2); }
.tick__o { color: var(--ink-1); font-weight: 600; }
.tick__d { font-size: 11px; }
.tick__d--u { color: #2bb37f; }
.tick__d--d { color: #e0703f; }

/* ─────────── 区块 ─────────── */
.section { padding: 104px 0; position: relative; }
.section--alt { background: var(--surface-2); border-block: 1px solid var(--line-soft); }

.sechead { max-width: 720px; margin-bottom: 52px; }
.sechead__num {
  display: inline-block;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em;
  color: var(--accent); margin-bottom: 14px;
  padding-bottom: 5px; border-bottom: 1px solid rgba(56, 189, 248, 0.3);
}
.sechead__title {
  font-size: clamp(25px, 3.4vw, 38px);
  margin-bottom: 15px;
  letter-spacing: -0.02em;
}
.sechead__sub { color: var(--ink-2); font-size: 16px; }

.note {
  margin-top: 32px;
  padding: 15px 20px;
  border-left: 2px solid var(--accent-3);
  background: rgba(2, 132, 199, 0.07);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--ink-2);
  font-size: 14px;
}

/* ─────────── 卡片 ─────────── */
.cards { display: grid; gap: 20px; }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.cards--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 30px 28px;
  display: flex; flex-direction: column;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.card:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.card h3 { font-size: 19px; margin-bottom: 12px; }
.card p { color: var(--ink-2); font-size: 14.5px; }

.card__icon {
  width: 42px; height: 42px; margin-bottom: 20px;
  display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 11px;
  background: rgba(56, 189, 248, 0.06);
}
.card__icon svg {
  width: 21px; height: 21px;
  fill: none; stroke: var(--accent); stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round;
}

.tag {
  display: inline-block; align-self: flex-start;
  font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.09);
  border: 1px solid rgba(56, 189, 248, 0.22);
  padding: 4px 10px; border-radius: 999px;
  margin-bottom: 17px;
}

.ticks { margin-top: 18px; display: grid; gap: 9px; }
.ticks li {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 12.5px;
  color: var(--ink-2);
  padding-top: 9px; border-top: 1px solid var(--line-soft);
}
.dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.dot--up      { background: var(--zone-up); }
.dot--down    { background: var(--zone-down); }
.dot--neutral { background: var(--ink-3); }

.formula {
  margin-top: 18px; padding: 15px 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-family: var(--mono); font-size: 13px;
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  color: var(--ink-1);
}
.formula__lhs { color: var(--accent); font-weight: 600; }
.formula__eq { color: var(--ink-3); }
.formula__rhs { color: var(--ink-2); }
.formula sub { font-size: 0.72em; }

/* ─────────── 图表 ─────────── */
.figure {
  margin: 0;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 26px;
}
.figure__cap { display: block; margin-bottom: 20px; }
.figure__title { display: block; font-size: 16px; font-weight: 650; color: var(--ink-1); }
.figure__sub { display: block; font-size: 13px; color: var(--ink-3); margin-top: 5px; }

.chart { position: relative; width: 100%; }
.chart svg { width: 100%; height: auto; overflow: visible; }

.chart__tip {
  position: absolute; z-index: 5;
  pointer-events: none; opacity: 0;
  transform: translate(-50%, -125%);
  background: rgba(8, 14, 24, 0.96);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  padding: 9px 13px;
  font-family: var(--mono); font-size: 12px;
  white-space: nowrap;
  box-shadow: 0 10px 28px -10px rgba(0, 0, 0, 0.85);
  transition: opacity 0.14s var(--ease);
}
.chart__tip.is-on { opacity: 1; }
.chart__tip b { color: var(--accent); font-weight: 600; }
.chart__tip span { color: var(--ink-3); }

.figure__foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  margin-top: 20px; padding-top: 17px;
  border-top: 1px solid var(--line-soft);
}
.legend { display: flex; gap: 20px; flex-wrap: wrap; }
.legend__item {
  display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--ink-2);
}
.swatch { width: 12px; height: 12px; border-radius: 3px; flex-shrink: 0; }
.swatch--up   { background: rgba(25, 158, 112, 0.3); border: 1px solid var(--zone-up); }
.swatch--down { background: rgba(217, 89, 38, 0.3); border: 1px solid var(--zone-down); }
.swatch--line { background: var(--accent); height: 3px; border-radius: 2px; }

/* 图表读数 */
.readout {
  display: grid; gap: 1px;
  margin-top: 20px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.readout__item {
  display: flex; gap: 18px; align-items: baseline;
  background: var(--surface-1);
  padding: 15px 22px;
}
.readout__k {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--ink-3); flex-shrink: 0; width: 46px;
}
.readout__v { color: var(--ink-2); font-size: 14.5px; }
.readout__item--fire { background: rgba(217, 89, 38, 0.08); }
.readout__item--fire .readout__k { color: var(--zone-down); }
.readout__item--fire .readout__v { color: var(--ink-1); }

/* ─────────── 管道 ─────────── */
.pipe {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  counter-reset: pipe;
}
.pipe__node {
  position: relative;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 26px 22px;
}
.pipe__node::after {
  content: "→";
  position: absolute; right: -14px; top: 50%; transform: translateY(-50%);
  color: var(--ink-3); font-size: 15px; z-index: 2;
}
.pipe__node:last-child::after { display: none; }
.pipe__idx {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em;
  color: var(--accent); display: block; margin-bottom: 11px;
}
.pipe__node h3 { font-size: 16.5px; margin-bottom: 9px; }
.pipe__node p { font-size: 13.5px; color: var(--ink-2); }

.axiom {
  margin-top: 34px;
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.1), rgba(15, 27, 45, 0.6));
  border: 1px solid rgba(56, 189, 248, 0.24);
  border-radius: var(--r-lg);
  padding: 32px 34px;
  text-align: center;
}
.axiom__label {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent);
}
.axiom__body {
  margin: 14px auto 0; max-width: 660px;
  font-size: 16.5px; color: var(--ink-2);
}
.axiom__math {
  margin-top: 20px;
  font-family: var(--mono); font-size: 19px;
  color: var(--accent); letter-spacing: 0.03em;
}
.axiom__math sub { font-size: 0.62em; color: var(--ink-3); }

/* ─────────── 表格 ─────────── */
.tablewrap {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--surface-1);
}
.tablewrap--wide { overflow-x: auto; }

.dtable { width: 100%; border-collapse: collapse; font-size: 14px; }
.dtable caption { text-align: left; }
.dtable th, .dtable td {
  padding: 15px 18px;
  text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
}
.dtable thead th {
  background: var(--surface-3);
  color: var(--ink-1);
  font-size: 12.5px; font-weight: 650;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.dtable tbody tr:last-child th,
.dtable tbody tr:last-child td { border-bottom: 0; }
.dtable tbody tr:hover { background: rgba(255, 255, 255, 0.018); }
.dtable td { color: var(--ink-2); }
.dtable .num { font-family: var(--mono); color: var(--ink-1); white-space: nowrap; }

.dtable--tier tbody th { min-width: 132px; }
.tier {
  display: inline-block;
  font-family: var(--mono); font-size: 11.5px; font-weight: 650;
  letter-spacing: 0.06em;
  padding: 3px 9px; border-radius: 5px;
  color: #04121d;
}
.tier--0 { background: var(--tier-0); }
.tier--1 { background: var(--tier-1); color: #eef7ff; }
.tier--2 { background: var(--tier-2); }
.tier--3 { background: var(--tier-3); color: #fff2f2; }
.dtable--tier tbody th em {
  display: block; margin-top: 7px;
  font-size: 13px; font-weight: 500; color: var(--ink-2);
}

.dtable--cmp th[scope="row"] { color: var(--ink-1); font-weight: 600; white-space: nowrap; }
.dtable--cmp .is-self { background: rgba(2, 132, 199, 0.09); color: var(--ink-1); }
.dtable--cmp thead .is-self { background: var(--accent-3); color: #f8fdff; }

.dtable--min th, .dtable--min td { padding: 10px 16px; font-family: var(--mono); font-size: 12.5px; }

/* ─────────── 统计块 ─────────── */
.stat {
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 34px 30px;
}
.stat__val {
  display: block;
  font-family: var(--mono);
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 600; line-height: 1;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.stat__unit { font-size: 0.46em; color: var(--ink-2); }
.stat h3 { font-size: 17px; margin: 16px 0 9px; }
.stat p { color: var(--ink-2); font-size: 14.5px; }

.iter {
  margin-top: 20px;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 30px 32px;
}
.iter__title { font-size: 17px; margin-bottom: 16px; }
.iter__list { display: grid; gap: 11px; }
.iter__list li {
  position: relative; padding-left: 22px;
  color: var(--ink-2); font-size: 14.5px;
}
.iter__list li::before {
  content: ""; position: absolute; left: 3px; top: 11px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
.iter__disclaimer {
  margin-top: 20px; padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px; color: var(--ink-3);
}

/* ─────────── 定价 ─────────── */
.plans { align-items: stretch; }
.plan {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 34px 28px 28px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.plan:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.plan--hot {
  border-color: rgba(56, 189, 248, 0.4);
  background: linear-gradient(180deg, rgba(2, 132, 199, 0.1), var(--surface-1) 40%);
  box-shadow: 0 20px 50px -28px rgba(56, 189, 248, 0.5);
}
.plan__badge {
  position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121d;
  font-size: 11.5px; font-weight: 700; letter-spacing: 0.06em;
  padding: 4px 14px; border-radius: 999px;
  white-space: nowrap;
}
.plan__name { font-size: 20px; }
.plan__en {
  font-family: var(--mono); font-size: 11.5px;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--ink-3); margin-top: 4px;
}
.plan__price {
  font-family: var(--mono);
  font-size: 38px; font-weight: 600; line-height: 1;
  color: var(--ink-1); margin-top: 22px;
  letter-spacing: -0.02em;
}
.plan__cur { font-size: 0.55em; color: var(--ink-2); margin-right: 2px; }
.plan__per { font-size: 0.36em; color: var(--ink-3); font-weight: 500; margin-left: 6px; }
.plan__usd { font-family: var(--mono); font-size: 12px; color: var(--ink-3); margin-top: 7px; }

.plan__feats {
  display: grid; gap: 10px;
  margin: 24px 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}
.plan__feats li {
  position: relative; padding-left: 24px;
  font-size: 14px; color: var(--ink-2);
}
.plan__feats li::before {
  content: ""; position: absolute; left: 4px; top: 9px;
  width: 9px; height: 5px;
  border-left: 1.6px solid var(--accent);
  border-bottom: 1.6px solid var(--accent);
  transform: rotate(-45deg);
}
.plan__for {
  font-size: 12.5px; color: var(--ink-3);
  margin-bottom: 20px; padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

/* ─────────── 路线图 ─────────── */
.road { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.road__step {
  position: relative;
  padding: 26px 24px;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  border-top: 2px solid var(--accent-3);
}
.road__ph {
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.14em; color: var(--accent);
  display: block;
}
.road__when { display: block; font-size: 12.5px; color: var(--ink-3); margin: 6px 0 12px; }
.road__step p { font-size: 14.5px; color: var(--ink-2); }

/* ─────────── CTA ─────────── */
.cta {
  position: relative;
  padding: 108px 0;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 130% at 50% 0%, rgba(14, 165, 233, 0.15), transparent 62%),
    var(--surface-2);
  border-top: 1px solid var(--line-soft);
}
.cta__title { font-size: clamp(28px, 4.2vw, 44px); letter-spacing: -0.02em; }
.cta__sub { margin: 20px auto 34px; color: var(--ink-2); font-size: 17px; max-width: 520px; }
.cta__btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.cta__hint { margin-top: 22px; font-size: 12.5px; color: var(--ink-3); }

/* ─────────── 页脚 ─────────── */
.foot {
  padding: 56px 0 40px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}
.foot__top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
  padding-bottom: 30px; border-bottom: 1px solid var(--line-soft);
}
.foot__brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 13.5px;
  letter-spacing: 0.12em; color: var(--ink-1);
}
.foot__brand .brand__mark { width: 26px; height: 26px; }
.foot__links { display: flex; gap: 24px; font-size: 13.5px; color: var(--ink-2); flex-wrap: wrap; }
.foot__links a:hover { color: var(--accent); }

.disclaimer { padding: 30px 0; border-bottom: 1px solid var(--line-soft); }
.disclaimer__title {
  font-family: var(--mono); font-size: 11.5px;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 14px; font-weight: 600;
}
.disclaimer p {
  font-size: 12.8px; color: var(--ink-3);
  line-height: 1.75; max-width: 900px;
}
.disclaimer p + p { margin-top: 9px; }
.disclaimer strong { color: var(--ink-2); }

.foot__copy { margin-top: 26px; font-size: 12px; color: var(--ink-3); }

/* ─────────── 入场动画 ─────────── */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ─────────── 响应式 ─────────── */
@media (max-width: 980px) {
  .cards--3, .pipe, .road { grid-template-columns: repeat(2, 1fr); }
  .pipe__node::after { display: none; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 76px; }
  .nav__links {
    position: fixed; inset: 68px 0 auto 0;
    flex-direction: column; gap: 0;
    background: rgba(8, 14, 24, 0.98);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 20px;
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: 13px 0; border-bottom: 1px solid var(--line-soft); font-size: 15px; }
  .nav__links a::after { display: none; }
  .nav .btn--sm { display: none; }
  .nav__toggle { display: block; }

  .hero { padding-top: 118px; }
  .section { padding: 72px 0; }
  .cards--3, .cards--2, .pipe, .road { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, 1fr); margin-top: 52px; }
  .figure { padding: 18px 14px; }
  .readout__item { flex-direction: column; gap: 6px; }
  .readout__k { width: auto; }
  .axiom { padding: 26px 20px; }
  .dtable th, .dtable td { padding: 13px 14px; font-size: 13.5px; }
  .foot__top { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .metrics { grid-template-columns: 1fr; }
  .wrap { padding: 0 18px; }
}

/* ─────────── 动效偏好 ─────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .ticker__track { animation: none; }
}

/* ─────────── 打印 ─────────── */
@media print {
  .nav, .ticker, .cta__btns, .hero__cta, .btn { display: none; }
  body { background: #fff; color: #000; }
  .section, .section--alt, .card, .plan, .figure { background: #fff; border-color: #ccc; }
}