/* v3.4 首页 / 登录：清新科技
   浅冷白底 + 青蓝刻度 + 等宽数字 + 轻动效（块内错峰、块间扫线）。
   动效统一由 --t-el / --t-block / --d 控制，reduced-motion 下全部归零。 */

:root {
  --home-container: 1120px;

  --ink: #0a1220;
  --ink-2: #1b2a40;
  --muted: #45566e;
  --faint: #6b7c93;

  --line: #e2ebf5;
  --line-soft: #edf4fa;
  --line-strong: #cfdceb;

  --paper: #ffffff;
  --wash: #f7fbfd;
  --wash-cyan: #f2fafd;

  --primary: #1f4fd8;
  --primary-hover: #1a43be;
  --primary-soft: #eef3ff;
  --cyan: #0891b2;
  --cyan-ink: #0e7490;
  --cyan-soft: #e7f7fb;
  --green: #0f766e;

  --grid: rgba(31, 79, 216, .045);
  --grid-strong: rgba(31, 79, 216, .072);

  --e-out: cubic-bezier(.22, .61, .36, 1);
  --e-io: cubic-bezier(.65, 0, .35, 1);
  --t-micro: 120ms;
  --t-el: 420ms;
  --t-block: 560ms;
  --d: 0ms;

  --mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: #fff; color: var(--ink);
  font-family: var(--font);
  font-size: calc(15px * 1.3); line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, p { margin: 0; }
::selection { background: rgba(8, 145, 178, .16); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 3px; }
[hidden] { display: none !important; }

.skip {
  position: fixed; left: 16px; top: -60px; z-index: 100; padding: 9px 14px; border-radius: 5px;
  background: #fff; color: var(--primary); box-shadow: 0 8px 24px rgba(10, 18, 32, .14);
  font-size: calc(13px * 1.3); transition: top .15s;
}
.skip:focus { top: 12px; }
.container { width: min(var(--home-container), calc(100% - 48px)); margin-inline: auto; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255, 255, 255, .84);
  backdrop-filter: saturate(170%) blur(14px);
  -webkit-backdrop-filter: saturate(170%) blur(14px);
  border-bottom: 1px solid rgba(31, 79, 216, .1);
  transition: box-shadow .2s var(--e-out), background .2s;
}
.site-header.scrolled { box-shadow: 0 8px 26px rgba(23, 58, 120, .06); }
.header-inner { height: 64px; display: flex; align-items: center; gap: 26px; }
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; min-width: 0; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 7px; display: grid; place-items: center;
  background: linear-gradient(150deg, #2a5ce8 0%, #1f4fd8 45%, #0891b2 100%);
  color: #fff; font-family: var(--mono); font-size: calc(10px * 1.3); font-weight: 700; letter-spacing: .02em; flex: none;
  box-shadow: 0 6px 16px rgba(31, 79, 216, .26), inset 0 1px 0 rgba(255, 255, 255, .35);
}
.brand-name { font-size: calc(13.5px * 1.3); font-weight: 650; white-space: nowrap; color: var(--ink); letter-spacing: -.005em; }
.header-nav { display: flex; align-items: center; gap: 22px; }
.header-link {
  position: relative; padding: 4px 0;
  font-family: var(--mono); font-size: calc(10px * 1.3); letter-spacing: .09em; color: var(--muted);
  transition: color .15s;
}
.header-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--cyan); transform: scaleX(0); transform-origin: left center;
  transition: transform .25s var(--e-out);
}
.header-link:hover { color: var(--ink); }
.header-link:hover::after { transform: scaleX(1); }
.header-chip {
  display: inline-flex; align-items: center; gap: 6px; flex: none;
  padding: 3px 8px; border: 1px solid rgba(8, 145, 178, .26); border-radius: 4px;
  background: rgba(8, 145, 178, .06); color: var(--cyan-ink);
  font-family: var(--mono); font-size: calc(9px * 1.3); letter-spacing: .08em;
}
.header-chip::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, .14);
}

/* ---------- 首屏 ---------- */
.login-section {
  position: relative; overflow: hidden; isolation: isolate;
  min-height: calc(100vh - 64px);
  display: flex; flex-direction: column; justify-content: center;
  padding: clamp(14px, 2.8vh, 36px) 0 0;
  background: linear-gradient(166deg, #ffffff 0%, #f5fbfd 46%, #e8f3fa 100%);
  border-bottom: 1px solid rgba(31, 79, 216, .1);
}
.login-section::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; z-index: 1;
  background: linear-gradient(90deg, transparent, rgba(8, 145, 178, .55) 26%, rgba(31, 79, 216, .38) 74%, transparent);
}
.hero-decor { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.hero-grid {
  position: absolute; inset: -160px;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(var(--grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-strong) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px, 200px 200px, 200px 200px;
  background-position: 0 0, 0 0, 0 0, 0 0;
  -webkit-mask-image: radial-gradient(120% 96% at 52% 0%, #000 20%, rgba(0, 0, 0, .5) 54%, transparent 82%);
  mask-image: radial-gradient(120% 96% at 52% 0%, #000 20%, rgba(0, 0, 0, .5) 54%, transparent 82%);
  animation: gridDrift 28s var(--e-io) infinite alternate;
  will-change: transform;
}
@keyframes gridDrift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-40px, -20px, 0); }
}
.hero-orb { position: absolute; border-radius: 50%; filter: blur(64px); will-change: transform, opacity; }
.orb-a {
  width: 520px; height: 520px; right: -70px; top: -150px;
  background: radial-gradient(circle at 50% 50%, rgba(34, 211, 238, .4), rgba(34, 211, 238, 0) 68%);
  animation: breathe 9s var(--e-io) infinite;
}
.orb-b {
  width: 440px; height: 440px; left: -90px; bottom: -170px;
  background: radial-gradient(circle at 50% 50%, rgba(31, 79, 216, .24), rgba(31, 79, 216, 0) 70%);
  animation: breathe 13s var(--e-io) infinite reverse;
}
@keyframes breathe {
  0%, 100% { transform: scale(1) translate3d(0, 0, 0); opacity: .72; }
  50% { transform: scale(1.09) translate3d(0, -12px, 0); opacity: 1; }
}

.login-wrap {
  position: relative; z-index: 1; flex: 1;
  width: min(var(--home-container), calc(100% - 48px));
  margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 1fr) 400px;
  gap: clamp(28px, 4.4vw, 64px);
  align-items: center;
  padding: clamp(8px, 2vh, 22px) 0 clamp(14px, 2.6vh, 30px);
}
.login-story { display: block; min-width: 0; }
.story-inner { width: 100%; max-width: 560px; }

.story-kicker {
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: 16px;
  font-family: var(--mono); font-size: calc(9.5px * 1.3); font-weight: 500;
  letter-spacing: .18em; color: var(--cyan-ink);
}
.story-kicker::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--cyan);
  animation: pulse 2.8s var(--e-io) infinite;
}
.story-kicker::after { content: ""; width: 22px; height: 1px; background: currentColor; opacity: .55; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(8, 145, 178, .16); }
  50% { box-shadow: 0 0 0 7px rgba(8, 145, 178, .04); }
}

.story-inner h1 {
  font-size: clamp(36px, 4.35vw, 56px); line-height: 1.13; letter-spacing: -.038em;
  font-weight: 680; color: var(--ink);
}
.h1-accent {
  background: linear-gradient(100deg, #2453c4 0%, #1f4fd8 42%, #0e7490 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent; -webkit-text-fill-color: transparent;
}
.story-lead { margin-top: 14px; font-size: calc(14.5px * 1.3); line-height: 1.76; color: var(--muted); max-width: 470px; }

.story-points { margin: 20px 0 0; padding: 0; list-style: none; }
.story-points li {
  display: grid; grid-template-columns: 27px 1fr; gap: 14px; align-items: start;
  padding: 9px 0; border-top: 1px solid var(--line);
}
.story-index {
  display: inline-flex; align-items: center; justify-content: center; width: 25px; height: 25px;
  border-radius: 4px; border: 1px solid rgba(8, 145, 178, .28); background: linear-gradient(#fff, #f4fbfd);
  color: var(--cyan-ink); font-family: var(--mono); font-size: calc(9px * 1.3); font-weight: 600;
}
.story-points b { display: block; font-size: calc(13.5px * 1.3); font-weight: 620; color: var(--ink-2); letter-spacing: .01em; }
.story-points p { margin-top: 3px; font-size: calc(12px * 1.3); line-height: 1.65; color: var(--muted); }

/* 位置刻度尺：产品自己的语言 */
.ruler { margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--line); }
.ruler-meta {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  font-family: var(--mono); font-size: calc(9px * 1.3); letter-spacing: .08em; color: var(--faint);
}
.ruler-track {
  position: relative; height: 24px; margin-top: 6px;
  background-image: repeating-linear-gradient(90deg, rgba(31, 79, 216, .17) 0 1px, transparent 1px 20px);
  background-size: 100% 7px; background-position: left bottom; background-repeat: no-repeat;
}
.ruler-track::before {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: linear-gradient(90deg, rgba(31, 79, 216, .1), rgba(31, 79, 216, .3) 50%, rgba(31, 79, 216, .1));
}
.ruler-delta {
  position: absolute; left: 50%; bottom: 0; width: 16.6%; height: 2px; border-radius: 1px;
  background: linear-gradient(90deg, rgba(8, 145, 178, .18), var(--cyan));
  transform-origin: left center;
}
.ruler-marker {
  position: absolute; left: 66.6%; bottom: -3px; width: 7px; height: 7px; margin-left: -3.5px;
  border-radius: 50%; background: #fff; border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(8, 145, 178, .12);
}
.ruler-scale {
  display: flex; justify-content: space-between; margin-top: 5px;
  font-family: var(--mono); font-size: calc(8.5px * 1.3); color: var(--faint); letter-spacing: .04em;
}
.anim .ruler-delta { transform: scaleX(0); animation: deltaGrow 760ms var(--e-out) 620ms forwards; }
.anim .ruler-marker { opacity: 0; transform: scale(.6); animation: markPop 420ms var(--e-out) 1.24s forwards; }
@keyframes deltaGrow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes markPop { from { opacity: 0; transform: scale(.6); } to { opacity: 1; transform: scale(1); } }

.story-stats { display: flex; gap: 38px; margin-top: 14px; }
.story-stats b {
  display: block; font-family: var(--mono); font-size: calc(26px * 1.3); line-height: 1;
  font-weight: 500; color: var(--ink); letter-spacing: -.03em; font-variant-numeric: tabular-nums;
}
.story-stats span { display: block; margin-top: 7px; font-size: calc(10.5px * 1.3); color: var(--muted); }
.story-note {
  margin-top: 10px; font-family: var(--mono); font-size: calc(9.5px * 1.3);
  letter-spacing: .05em; color: var(--faint);
}

/* 登录卡 */
.login-card {
  position: relative; width: 100%; max-width: 400px; justify-self: end; z-index: 2;
  padding: 26px 26px 22px; text-align: left;
  background: rgba(255, 255, 255, .93);
  border: 1px solid rgba(31, 79, 216, .14);
  border-radius: 12px;
  box-shadow: 0 26px 64px rgba(23, 58, 120, .1), 0 2px 10px rgba(23, 58, 120, .05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.login-card::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(90deg, #1f4fd8, #0891b2 62%, #22d3ee);
}
.login-card::after {
  content: ""; position: absolute; inset: 9px; border-radius: 8px; pointer-events: none;
  background:
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) left top / 11px 1px no-repeat,
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) left top / 1px 11px no-repeat,
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) right top / 11px 1px no-repeat,
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) right top / 1px 11px no-repeat,
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) left bottom / 11px 1px no-repeat,
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) left bottom / 1px 11px no-repeat,
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) right bottom / 11px 1px no-repeat,
    linear-gradient(rgba(8, 145, 178, .32), rgba(8, 145, 178, .32)) right bottom / 1px 11px no-repeat;
}
.login-card h2 { font-size: calc(21px * 1.3); line-height: 1.3; letter-spacing: -.02em; font-weight: 650; color: var(--ink); }
.login-card-sub { margin: 7px 0 20px; font-size: calc(12px * 1.3); line-height: 1.6; color: var(--muted); }
.field { margin-bottom: 14px; }
.field label { display: block; margin-bottom: 6px; font-size: calc(11.5px * 1.3); font-weight: 600; color: var(--ink-2); letter-spacing: .02em; }
.field input {
  width: 100%; height: 42px; padding: 0 12px;
  border: 1px solid #dbe6f2; border-radius: 6px;
  background: #fbfdff; color: var(--ink);
  font-size: calc(13.5px * 1.3); font-family: inherit;
  transition: border-color var(--t-micro), box-shadow var(--t-micro), background var(--t-micro);
}
.field input::placeholder { color: #93a3b8; }
.field input:hover { border-color: #c3d5e8; background: #fff; }
.field input:focus {
  outline: none; border-color: var(--cyan); background: #fff;
  box-shadow: 0 0 0 3px rgba(8, 145, 178, .14), inset 0 0 0 1px rgba(8, 145, 178, .1);
}
.login-error {
  margin: 0 0 12px; padding: 8px 10px; border: 1px solid rgba(168, 38, 27, .28); border-radius: 5px;
  background: #fdf3f1; color: #a8261b; font-size: calc(12px * 1.3); line-height: 1.6;
}
.login-btn {
  position: relative; overflow: hidden;
  width: 100%; height: 44px; border: 1px solid #1b46c4; border-radius: 6px;
  background: linear-gradient(180deg, #2a5ce8 0%, #1f4fd8 100%);
  color: #fff; font-size: calc(13.5px * 1.3); font-weight: 600; letter-spacing: .02em;
  box-shadow: 0 8px 20px rgba(31, 79, 216, .22), inset 0 1px 0 rgba(255, 255, 255, .22);
  transition: transform var(--t-micro) var(--e-out), box-shadow .2s var(--e-out), background .15s;
}
.login-btn::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(100deg, transparent 32%, rgba(255, 255, 255, .34) 50%, transparent 68%);
  transform: translateX(-120%); transition: transform .62s var(--e-out);
}
.login-btn:hover {
  background: linear-gradient(180deg, #2a5ce8 0%, #1d4bd0 100%);
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(31, 79, 216, .26), inset 0 1px 0 rgba(255, 255, 255, .28);
}
.login-btn:hover::after { transform: translateX(120%); }
.login-btn:active { transform: translateY(0); }
.login-btn:disabled { opacity: .7; cursor: default; transform: none; box-shadow: none; }
.login-hint { margin-top: 13px; font-size: calc(11px * 1.3); line-height: 1.6; color: var(--faint); text-align: center; }

/* 首屏底部数据条 */
.hero-strip {
  position: relative; z-index: 1; flex: none;
  border-top: 1px solid rgba(31, 79, 216, .1);
  background: rgba(255, 255, 255, .58);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.strip-inner {
  width: min(var(--home-container), calc(100% - 48px)); margin: 0 auto;
  display: flex; align-items: center; gap: 18px; min-height: 52px;
  overflow-x: auto; scrollbar-width: none;
  font-family: var(--mono); font-size: calc(10px * 1.3); letter-spacing: .05em; color: var(--faint);
  white-space: nowrap;
}
.strip-inner::-webkit-scrollbar { display: none; }
.strip-label { flex: none; color: var(--cyan-ink); letter-spacing: .15em; }
.strip-item { display: inline-flex; align-items: baseline; gap: 6px; flex: none; color: var(--muted); }
.strip-item b {
  font-size: calc(13px * 1.3); font-weight: 600; color: var(--ink);
  letter-spacing: -.01em; font-variant-numeric: tabular-nums;
}
.strip-sep { width: 1px; height: 14px; background: rgba(31, 79, 216, .14); flex: none; }
.strip-tail { margin-left: auto; flex: none; color: #93a3b8; font-size: calc(9px * 1.3); }

/* ---------- 通用区块 ---------- */
#main { counter-reset: sec; }

.section {
  position: relative; isolation: isolate;
  padding: 88px 0; background: #fff;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 80px;
  counter-increment: sec;
}
.section::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 1px; z-index: 0;
  background: linear-gradient(90deg, transparent, rgba(8, 145, 178, .5) 18%, rgba(31, 79, 216, .34) 62%, transparent);
  transform: scaleX(1); transform-origin: left center;
}
.section::after {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 240px; z-index: 0;
  pointer-events: none; opacity: 0;
  background: linear-gradient(90deg, rgba(34, 211, 238, 0), rgba(34, 211, 238, .09) 42%, rgba(31, 79, 216, .05) 72%, rgba(31, 79, 216, 0));
  transform: translate3d(-3%, 0, 0);
}
.anim .section::before { transform: scaleX(0); transition: transform var(--t-block) var(--e-out); }
.anim .section.is-in::before { transform: scaleX(1); }
.anim .section.is-in::after { animation: washSweep 900ms var(--e-io) 60ms both; }
@keyframes washSweep {
  0% { opacity: 0; transform: translate3d(-3%, 0, 0); }
  36% { opacity: 1; }
  100% { opacity: 0; transform: translate3d(3%, 0, 0); }
}
.section > .container { position: relative; z-index: 1; }

#value { border-top: 0; background: #fff; }
#capabilities { background: var(--wash); }
#method { background: #fff; }
#levels { background: var(--wash-cyan); }
#metrics { background: #fff; }
#trust { background: var(--wash); }
#workflow { background: #fff; }
#roles { background: var(--wash-cyan); }
#scenarios { background: #fff; }
#faq { background: #f8fbfe; }

.section-kicker {
  display: inline-flex; align-items: center; gap: 9px; margin-bottom: 14px;
  font-family: var(--mono); font-size: calc(9.5px * 1.3); font-weight: 500;
  letter-spacing: .16em; color: var(--cyan-ink);
}
.section-kicker::before {
  content: counter(sec, decimal-leading-zero);
  padding-right: 9px; margin-right: 2px;
  border-right: 1px solid rgba(8, 145, 178, .34);
  font-weight: 600; letter-spacing: .06em;
}
.section h2 {
  font-size: clamp(31px, 3.55vw, 43px); line-height: 1.32;
  letter-spacing: -.03em; font-weight: 680; color: var(--ink); max-width: 880px;
}
.lead { max-width: 780px; margin-top: 14px; font-size: calc(14.5px * 1.3); line-height: 1.82; color: var(--muted); }
.note { margin-top: 24px; font-size: calc(12.5px * 1.3); line-height: 1.8; color: var(--muted); }
.note strong { color: var(--ink-2); font-weight: 600; }

/* ---------- 为什么 ---------- */
.columns-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 40px; }
.plain-item {
  position: relative; padding: 20px 20px 22px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
  transition: transform .25s var(--e-out), border-color .25s, box-shadow .25s;
}
.plain-item::before {
  content: ""; position: absolute; left: 20px; right: 20px; top: 0; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, rgba(31, 79, 216, .5), rgba(8, 145, 178, .5));
  opacity: 0; transition: opacity .25s;
}
.plain-item:hover { transform: translateY(-2px); border-color: rgba(8, 145, 178, .3); box-shadow: 0 14px 30px rgba(23, 58, 120, .07); }
.plain-item:hover::before { opacity: 1; }
.plain-index { font-family: var(--mono); font-size: calc(9.5px * 1.3); letter-spacing: .14em; color: var(--cyan-ink); }
.plain-item h3 { margin: 10px 0 7px; font-size: calc(16px * 1.3); line-height: 1.55; font-weight: 650; color: var(--ink); letter-spacing: -.01em; }
.plain-item p { font-size: calc(13px * 1.3); line-height: 1.82; color: var(--muted); }

.statement {
  position: relative; margin-top: 38px; padding: 22px 26px 22px 28px;
  border: 1px solid rgba(8, 145, 178, .18); border-left: 3px solid var(--cyan); border-radius: 0 10px 10px 0;
  background: linear-gradient(100deg, #f0f9fc 0%, #f7fcfe 58%, #ffffff 100%);
  color: var(--ink-2); font-size: calc(15px * 1.3); line-height: 1.78; letter-spacing: -.005em;
}

/* ---------- 平台能力 ---------- */
.capability-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 40px; }
.cap-card {
  position: relative; padding: 22px 22px 24px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
  transition: transform .25s var(--e-out), border-color .25s, box-shadow .25s;
}
.cap-card:hover { transform: translateY(-2px); border-color: rgba(8, 145, 178, .3); box-shadow: 0 14px 30px rgba(23, 58, 120, .07); }
.cap-num { display: inline-block; font-family: var(--mono); font-size: calc(9.5px * 1.3); font-weight: 500; letter-spacing: .14em; color: var(--cyan-ink); }
.cap-card h3 { margin: 9px 0 6px; font-size: calc(15px * 1.3); font-weight: 650; line-height: 1.55; letter-spacing: -.01em; }
.cap-card p { font-size: calc(12.5px * 1.3); line-height: 1.78; color: var(--muted); }
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
.tag {
  padding: 4px 9px; border: 1px solid rgba(8, 145, 178, .2); border-radius: 4px;
  background: rgba(255, 255, 255, .8); color: var(--cyan-ink);
  font-size: calc(10.5px * 1.3); line-height: 1.5; white-space: nowrap;
}

/* ---------- 方法 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; margin-top: 38px; }
.step { position: relative; padding: 18px 0 0; border-top: 1px solid var(--line-strong); }
.step::before {
  content: ""; position: absolute; left: 0; top: -1px; width: 34px; height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(8, 145, 178, 0));
}
.step-num {
  display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px;
  border-radius: 4px; background: linear-gradient(#fff, #f2fafd); border: 1px solid rgba(8, 145, 178, .26);
  color: var(--cyan-ink); font-family: var(--mono); font-size: calc(9.5px * 1.3); font-weight: 600;
}
.step h3 { margin: 9px 0 5px; font-size: calc(15px * 1.3); font-weight: 650; line-height: 1.5; letter-spacing: -.01em; }
.step p { font-size: calc(12.5px * 1.3); line-height: 1.78; color: var(--muted); }

/* 9 档色带 */
.band-panel {
  margin-top: 32px; padding: 18px 20px 16px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
  box-shadow: 0 10px 26px rgba(23, 58, 120, .04);
}
.band-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  font-family: var(--mono); font-size: calc(10.5px * 1.3); letter-spacing: .04em; color: var(--faint);
}
.band-head b { font-family: inherit; color: var(--ink); font-weight: 600; }
.band { display: grid; grid-template-columns: repeat(9, minmax(0, 1fr)); gap: 3px; margin-top: 12px; }
.band-cell {
  padding: 9px 3px; border-radius: 3px; text-align: center;
  font-family: var(--mono); font-size: calc(10px * 1.3); line-height: 1.4; color: #fff;
  transition: transform .2s var(--e-out), box-shadow .2s;
}
.band-cell small { display: block; font-size: calc(8.5px * 1.3); opacity: .8; }
.band-cell:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(8, 90, 130, .18); }
.b1 { background: #0b3566; }
.b2 { background: #12457f; }
.b3 { background: #195a99; }
.b4 { background: #2274b8; }
.b5 { background: #2f93cf; }
.b6 { background: #52b6e0; color: #062a3d; }
.b7 { background: #86d2ea; color: #062a3d; }
.b8 { background: #b9e8f4; color: #062a3d; }
.b9 { background: #e3f7fb; color: #062a3d; }

/* 计算示例 */
.example {
  display: grid; grid-template-columns: .95fr 1.05fr; margin-top: 30px;
  border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff;
}
.example-copy { padding: 26px 28px; }
.example-copy h3 { font-size: calc(17px * 1.3); line-height: 1.55; font-weight: 650; letter-spacing: -.015em; }
.example-copy p { margin-top: 9px; font-size: calc(13px * 1.3); line-height: 1.82; color: var(--muted); }
.example-calc { padding: 26px 28px; background: linear-gradient(180deg, #f5fbfe, #f8fcff); border-left: 1px solid var(--line); }
.calc-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 10px 0; border-bottom: 1px solid rgba(31, 79, 216, .08);
  font-size: calc(12px * 1.3);
}
.calc-row:first-child { padding-top: 0; }
.calc-row span:first-child { color: var(--faint); flex: none; }
.calc-row span:last-child { font-family: var(--mono); color: var(--ink-2); text-align: right; letter-spacing: -.01em; }
.calc-result { margin-top: 16px; font-size: calc(13px * 1.3); font-weight: 600; color: var(--cyan-ink); }
.example-note { margin-top: 12px; font-size: calc(11px * 1.3); line-height: 1.7; color: var(--faint); }

/* ---------- 四层 ---------- */
.level-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 38px; }
.level-card {
  position: relative; padding: 24px 24px 22px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
  transition: transform .25s var(--e-out), border-color .25s, box-shadow .25s;
  overflow: hidden;
}
.level-card::after {
  content: ""; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px; border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, .14), rgba(34, 211, 238, 0) 70%);
  transition: transform .35s var(--e-out);
}
.level-card:hover { transform: translateY(-2px); border-color: rgba(8, 145, 178, .3); box-shadow: 0 14px 30px rgba(23, 58, 120, .07); }
.level-card:hover::after { transform: scale(1.25); }
.level-label { font-family: var(--mono); font-size: calc(9.5px * 1.3); font-weight: 500; letter-spacing: .12em; color: var(--cyan-ink); }
.level-card h3 { margin: 9px 0 7px; font-size: calc(16px * 1.3); font-weight: 650; line-height: 1.5; letter-spacing: -.01em; }
.level-card p { font-size: calc(13px * 1.3); line-height: 1.82; color: var(--muted); }
.level-scope { margin-top: 13px; padding-top: 11px; border-top: 1px solid var(--line-soft); font-size: calc(11px * 1.3); line-height: 1.7; color: var(--faint); }

/* 结果 / 链路 */
.result-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 16px; margin-top: 26px; }
.table-card, .chain-card {
  padding: 22px; border: 1px solid var(--line); border-radius: 10px; background: #fff;
  min-width: 0; box-shadow: 0 10px 26px rgba(23, 58, 120, .04);
}
.mini-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px;
  font-family: var(--mono); font-size: calc(9.5px * 1.3); letter-spacing: .08em; color: var(--faint);
}
.mini-head b { font-family: inherit; font-size: calc(12px * 1.3); font-weight: 600; color: var(--ink); letter-spacing: 0; }
.result-table-wrap { overflow-x: auto; max-width: 100%; }
.result-table { width: 100%; border-collapse: collapse; font-size: calc(12px * 1.3); min-width: 420px; }
.result-table th {
  padding: 8px 10px; text-align: left; font-size: calc(10px * 1.3); font-weight: 600;
  color: var(--faint); background: #f7fbfd; border-bottom: 1px solid var(--line);
  white-space: nowrap; letter-spacing: .02em;
}
.result-table td {
  padding: 9px 10px; border-bottom: 1px solid var(--line-soft); color: var(--ink-2);
  white-space: nowrap; font-variant-numeric: tabular-nums;
}
.result-table tr:last-child td { border-bottom: 0; }
.result-table td:first-child { font-weight: 600; color: var(--ink); }
.up { color: var(--green); font-weight: 600; }
.down { color: #a8261b; font-weight: 600; }
.flat { color: var(--faint); }
.pill { display: inline-flex; align-items: center; padding: 2px 7px; border-radius: 4px; font-size: calc(10px * 1.3); line-height: 1.6; font-weight: 600; }
.pill-up { background: #ecf8f4; color: var(--green); }
.pill-flat { background: #f1f5f9; color: var(--muted); }
.pill-down { background: #fdf1ef; color: #a8261b; }
.mini-note { margin-top: 12px; font-size: calc(11px * 1.3); line-height: 1.7; color: var(--faint); }

.chain-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; counter-reset: chain; }
.chain-list li { position: relative; padding-left: 27px; font-size: calc(12.5px * 1.3); line-height: 1.6; color: var(--ink-2); }
.chain-list li::before {
  counter-increment: chain; content: counter(chain); position: absolute; left: 0; top: 1px;
  width: 17px; height: 17px; border-radius: 4px; display: grid; place-items: center;
  background: linear-gradient(#fff, #f2fafd); border: 1px solid rgba(8, 145, 178, .26); color: var(--cyan-ink);
  font-family: var(--mono); font-size: calc(8.5px * 1.3); font-weight: 600;
}
.chain-list li span { display: block; font-size: calc(10.5px * 1.3); line-height: 1.6; color: var(--faint); margin-top: 1px; }

/* ---------- 指标口径 ---------- */
.metric-table-wrap {
  margin-top: 32px; border: 1px solid var(--line); border-radius: 10px; background: #fff;
  overflow-x: auto; box-shadow: 0 10px 26px rgba(23, 58, 120, .04);
}
.metric-table { width: 100%; border-collapse: collapse; font-size: calc(12px * 1.3); min-width: 760px; }
.metric-table th {
  padding: 10px 12px; text-align: left; font-size: calc(10px * 1.3); font-weight: 600;
  letter-spacing: .02em; color: var(--faint); background: #f7fbfd;
  border-bottom: 1px solid var(--line); white-space: nowrap;
}
.metric-table td { padding: 10px 12px; border-bottom: 1px solid var(--line-soft); line-height: 1.7; color: var(--ink-2); vertical-align: top; }
.metric-table tr:last-child td { border-bottom: 0; }
.metric-table tbody tr:hover td { background: #f9fcfe; }
.metric-table td:first-child { font-weight: 600; color: var(--ink); white-space: nowrap; }
.metric-table td:last-child { color: var(--faint); white-space: nowrap; }
.metric-table code {
  font-family: var(--mono); font-size: calc(10.5px * 1.3); color: var(--primary);
  background: var(--primary-soft); padding: 1px 5px; border-radius: 3px;
}
.subhead {
  margin-top: 28px; font-family: var(--mono); font-size: calc(9.5px * 1.3);
  letter-spacing: .12em; color: var(--faint);
}
.edge-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
.edge-item {
  padding: 11px 12px; border: 1px solid var(--line); border-radius: 6px; background: #fff;
  font-size: calc(11px * 1.3); line-height: 1.6; color: var(--muted);
  transition: border-color .2s, background .2s;
}
.edge-item:hover { border-color: rgba(8, 145, 178, .3); background: #fbfeff; }
.edge-item b { display: block; margin-bottom: 2px; font-size: calc(11.5px * 1.3); font-weight: 600; color: var(--ink-2); }
.report-structure {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; padding: 14px 16px;
  border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.report-structure b {
  width: 100%; font-family: var(--mono); font-size: calc(9px * 1.3);
  letter-spacing: .1em; color: var(--faint); margin-bottom: 2px;
}
.report-structure span {
  padding: 3px 8px; border: 1px solid rgba(8, 145, 178, .2); border-radius: 4px;
  background: #fbfeff; font-size: calc(10.5px * 1.3); color: var(--muted);
}

/* ---------- 可信 ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 48px; margin-top: 38px; }
.trust-item {
  display: grid; grid-template-columns: 26px 1fr; gap: 13px;
  padding-top: 16px; border-top: 1px solid var(--line-strong);
}
.trust-num {
  display: inline-flex; align-items: center; justify-content: center; width: 23px; height: 23px;
  border-radius: 4px; border: 1px solid rgba(8, 145, 178, .26); background: #fff;
  color: var(--cyan-ink); font-family: var(--mono); font-size: calc(9px * 1.3); font-weight: 600;
}
.trust-item h3 { font-size: calc(15px * 1.3); font-weight: 650; line-height: 1.5; letter-spacing: -.01em; }
.trust-item p { margin-top: 6px; font-size: calc(12.5px * 1.3); line-height: 1.82; color: var(--muted); }
.trust-note {
  margin-top: 32px; padding: 16px 20px;
  border: 1px solid rgba(8, 145, 178, .16); border-left: 3px solid var(--cyan); border-radius: 0 8px 8px 0;
  background: linear-gradient(100deg, #f1fbfd, #f9fdff 70%, #fff);
  font-size: calc(12px * 1.3); line-height: 1.85; color: var(--ink-2);
}
.trust-note strong { color: var(--cyan-ink); font-weight: 600; }

/* ---------- 场景 / 路线 ---------- */
.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 38px; }
.scenario {
  padding: 20px 20px 22px; border: 1px solid var(--line); border-radius: 10px; background: #fff;
  transition: transform .25s var(--e-out), border-color .25s, box-shadow .25s;
}
.scenario:hover { transform: translateY(-2px); border-color: rgba(8, 145, 178, .3); box-shadow: 0 14px 30px rgba(23, 58, 120, .07); }
.scenario h3 { font-size: calc(16px * 1.3); font-weight: 650; line-height: 1.5; letter-spacing: -.01em; }
.scenario p { margin-top: 7px; font-size: calc(13px * 1.3); line-height: 1.82; color: var(--muted); }
.roadmap {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 40px;
}
.roadmap > div {
  padding: 22px 24px; border: 1px solid var(--line); border-radius: 10px; background: #fff;
}
.roadmap > div:first-child { border-color: rgba(8, 145, 178, .22); background: linear-gradient(180deg, #fbfeff, #fff); }
.roadmap h3 { font-family: var(--mono); font-size: calc(9.5px * 1.3); letter-spacing: .14em; color: var(--cyan-ink); }
.roadmap ul { margin: 14px 0 0; padding: 0; list-style: none; display: grid; gap: 9px; }
.roadmap li { position: relative; padding-left: 16px; font-size: calc(12.5px * 1.3); line-height: 1.7; color: var(--ink-2); }
.roadmap li::before { content: ""; position: absolute; left: 0; top: .68em; width: 6px; height: 1px; background: var(--cyan); }
.roadmap ul.planned li { padding-left: 16px; color: var(--muted); }
.roadmap ul.planned li::before { background: #b54708; }
.roadmap-note { margin-top: 14px; font-size: calc(10.5px * 1.3); line-height: 1.7; color: var(--faint); }

/* ---------- 工作流 / 角色 ---------- */
.workflow-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 38px; }
.flow-card {
  position: relative; padding: 20px 22px 22px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
  transition: transform .25s var(--e-out), border-color .25s, box-shadow .25s;
}
.flow-card:hover { transform: translateY(-2px); border-color: rgba(8, 145, 178, .3); box-shadow: 0 14px 30px rgba(23, 58, 120, .07); }
.flow-num { font-family: var(--mono); font-size: calc(9.5px * 1.3); letter-spacing: .12em; color: var(--cyan-ink); }
.flow-card h3 { margin: 9px 0 5px; font-size: calc(14.5px * 1.3); font-weight: 650; line-height: 1.5; letter-spacing: -.01em; }
.flow-card p { font-size: calc(12px * 1.3); line-height: 1.78; color: var(--muted); }

.role-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 38px; }
.role-card {
  padding: 22px; border: 1px solid var(--line); border-radius: 10px; background: #fff;
  transition: transform .25s var(--e-out), border-color .25s, box-shadow .25s;
}
.role-card:hover { transform: translateY(-2px); border-color: rgba(8, 145, 178, .3); box-shadow: 0 14px 30px rgba(23, 58, 120, .07); }
.role-label { font-family: var(--mono); font-size: calc(9px * 1.3); letter-spacing: .12em; color: var(--cyan-ink); }
.role-q { margin: 9px 0 6px; font-size: calc(14px * 1.3); font-weight: 650; line-height: 1.55; color: var(--ink); letter-spacing: -.01em; }
.role-a { font-size: calc(12px * 1.3); line-height: 1.78; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 900px; margin-top: 34px; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); transition: background .2s; }
.faq-item:hover { background: rgba(255, 255, 255, .6); }
.faq-item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 16px 4px; cursor: pointer; list-style: none;
  font-size: calc(14px * 1.3); font-weight: 650; color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; flex: none; color: var(--cyan-ink);
  font-family: var(--mono); font-size: calc(15px * 1.3); line-height: 1; font-weight: 400;
  transition: transform .25s var(--e-out);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 24px 18px 4px; font-size: calc(12.5px * 1.3); line-height: 1.85; color: var(--muted); }
.faq-item b { color: var(--ink-2); font-weight: 600; }

/* ---------- 收尾 ---------- */
.closing {
  position: relative; overflow: hidden; isolation: isolate;
  padding: 76px 0; text-align: center;
  border-top: 1px solid rgba(31, 79, 216, .1);
  background: linear-gradient(172deg, #f8fcfd 0%, #eef7fb 100%);
}
.closing::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(80% 120% at 50% 0%, #000 10%, transparent 78%);
  mask-image: radial-gradient(80% 120% at 50% 0%, #000 10%, transparent 78%);
}
.closing > .container { position: relative; z-index: 1; }
.closing p { font-size: clamp(25px, 2.75vw, 33px); font-weight: 650; letter-spacing: -.025em; color: var(--ink); }
.closing span { display: block; margin-top: 10px; font-size: calc(12.5px * 1.3); color: var(--muted); }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative; padding: 30px 0;
  background: #eef5fa; border-top: 1px solid rgba(31, 79, 216, .1);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: calc(11px * 1.3); color: var(--faint);
}
.footer-brand { display: flex; align-items: center; gap: 8px; color: var(--ink-2); }
.footer-brand .brand-mark { width: 22px; height: 22px; border-radius: 5px; font-size: calc(8px * 1.3); }
.footer-links { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; row-gap: 8px; }
.footer-links a { color: var(--muted); transition: color .15s; }
.footer-links a:hover { color: var(--cyan-ink); }
.footer-note {
  margin-top: 12px; font-family: var(--mono); font-size: calc(9.5px * 1.3);
  letter-spacing: .04em; color: var(--faint);
}

/* ---------- 右侧进度刻度 ---------- */
.rail { display: none; }
@media (min-width: 1280px) {
  .rail {
    position: fixed; right: 20px; top: 50%; transform: translateY(-50%); z-index: 30;
    display: flex; flex-direction: column; align-items: flex-end; gap: 1px;
  }
  .rail-item {
    display: flex; align-items: center; justify-content: flex-end; gap: 9px;
    padding: 4px 0; color: rgba(31, 79, 216, .22);
    transition: color .25s var(--e-out);
  }
  .rail-item span {
    font-family: var(--mono); font-size: calc(9px * 1.3); letter-spacing: .1em;
    color: #9aabbd; transition: color .25s;
  }
  .rail-item i {
    display: block; width: 14px; height: 1px; background: currentColor;
    transition: width .3s var(--e-out), background .3s, box-shadow .3s;
  }
  .rail-item:hover { color: rgba(31, 79, 216, .5); }
  .rail-item:hover span { color: var(--muted); }
  .rail-item.active { color: var(--cyan); }
  .rail-item.active span { color: var(--cyan-ink); }
  .rail-item.active i {
    width: 26px;
    box-shadow: 0 0 0 3px rgba(8, 145, 178, .1), 0 0 10px rgba(8, 145, 178, .35);
  }
}

/* ---------- 动效：块内错峰 ---------- */
.anim [data-reveal] {
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition:
    opacity var(--t-el) var(--e-out) var(--d),
    transform var(--t-el) var(--e-out) var(--d);
  will-change: opacity, transform;
}
.anim [data-reveal].is-in { opacity: 1; transform: none; }
.anim [data-reveal="fade"] { transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .login-wrap { grid-template-columns: minmax(0, 1fr) 376px; gap: 40px; }
  .story-inner { max-width: 520px; }
}
@media (max-width: 980px) {
  .site-header { position: sticky; }
  .header-nav { display: none; }
  .login-section { min-height: 0; padding: 40px 0 0; }
  .login-wrap { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 26px 0 36px; }
  .story-inner { max-width: 600px; margin: 0 auto; }
  .story-inner h1 { font-size: calc(34px * 1.3); }
  .story-points, .story-stats, .story-note { display: none; }
  .ruler { margin-top: 18px; }
  .login-card { justify-self: center; max-width: 420px; }
  .strip-inner { gap: 14px; min-height: 48px; }
  .strip-tail { display: none; }
}
@media (max-width: 900px) {
  .columns-3, .scenario-grid { grid-template-columns: 1fr; gap: 12px; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .capability-grid, .workflow-grid, .role-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .result-grid { grid-template-columns: 1fr; }
  .edge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .level-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; gap: 24px; }
  .roadmap { grid-template-columns: 1fr; }
  .example { grid-template-columns: 1fr; }
  .example-calc { border-left: 0; border-top: 1px solid var(--line); }
  .section { padding: 64px 0; }
}
@media (max-width: 600px) {
  .container, .login-wrap { width: calc(100% - 32px); }
  .strip-inner { width: calc(100% - 32px); }
  .header-inner { height: 60px; gap: 12px; }
  .brand-name { font-size: calc(13px * 1.3); }
  .header-chip { display: none; }
  .login-section { padding: 28px 0 0; }
  .login-wrap { padding: 18px 0 28px; gap: 22px; }
  .story-inner h1 { font-size: calc(29px * 1.3); }
  .story-lead { font-size: calc(13.5px * 1.3); }
  .ruler-scale { font-size: calc(8px * 1.3); }
  .ruler-meta { font-size: calc(8.5px * 1.3); }
  .login-card { padding: 22px 20px 18px; border-radius: 10px; }
  .section { padding: 54px 0; }
  .section h2 { font-size: calc(24px * 1.3); }
  .lead { font-size: calc(14px * 1.3); }
  .steps { grid-template-columns: 1fr; }
  .capability-grid, .workflow-grid, .role-grid, .edge-grid { grid-template-columns: 1fr; }
  .band-panel { padding: 14px 12px; }
  .band { gap: 2px; }
  .band-cell { padding: 6px 1px; font-size: calc(9px * 1.3); }
  .band-cell small { font-size: calc(7px * 1.3); }
  .example-copy, .example-calc { padding: 20px; }
  .calc-row { flex-direction: column; gap: 3px; }
  .calc-row span:last-child { text-align: left; }
  .level-card, .cap-card, .flow-card, .role-card, .plain-item, .scenario { padding: 20px; }
  .statement { padding: 18px 18px 18px 20px; font-size: calc(14px * 1.3); }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* 矮屏收紧首屏，保证登录卡与数据条都在一屏内 */
@media (max-height: 840px) and (min-width: 981px) {
  .story-points li { padding: 7px 0; }
  .story-note { display: none; }
  .ruler { margin-top: 12px; }
}
@media (max-height: 760px) and (min-width: 981px) {
  .ruler { display: none; }
  .story-stats { margin-top: 10px; }
  .story-inner h1 { font-size: clamp(32px, 4vw, 46px); }
}

@media (max-width: 600px) {
  .hero-grid { opacity: .6; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .anim [data-reveal] { opacity: 1; transform: none; }
}