/* Kiwi 官网 — 全中文产品站共享样式，零外部依赖 */

:root {
  --kiwi-950: #143d18;
  --kiwi-900: #1b5e20;
  --kiwi-800: #2e7d32;
  --kiwi-700: #388e3c;
  --kiwi-600: #43a047;
  --kiwi-500: #66bb6a;
  --kiwi-300: #a5d6a7;
  --kiwi-100: #e8f5e9;
  --kiwi-50: #f6faf6;
  --lime: #e8f5e9;
  --ink: #1a1f1a;
  --ink-soft: #4b554b;
  --paper: #ffffff;
  --paper-soft: #f6f8f6;
  --line: #dde5dd;
  --line-dark: rgba(255, 255, 255, 0.16);
  --radius: 16px;
  --shadow: 0 24px 70px rgba(8, 40, 20, 0.14);
  --maxw: 1120px;
  font-size: 17px;
}

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

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--kiwi-700); text-underline-offset: 0.2em; }
a:visited { color: #496b4f; }
a:focus-visible,
.btn:focus-visible { outline: 3px solid var(--lime); outline-offset: 4px; }

/* 顶部导航 */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 254, 249, 0.94);
  border-bottom: 1px solid rgba(20, 32, 25, 0.12);
  backdrop-filter: blur(14px);
}

.nav-inner {
  width: min(100%, calc(var(--maxw) + 48px));
  min-height: 68px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  color: var(--kiwi-900) !important;
  font-size: 1.25rem;
  font-weight: 850;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.nav-logo::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 9px;
  background: var(--kiwi-600);
  border-radius: 2px;
  transform: rotate(12deg);
}

.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a,
.nav-links a:visited {
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  padding: 21px 0 18px;
  font-size: 0.9rem;
  font-weight: 620;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active,
.nav-links a.active:visited {
  color: var(--kiwi-800);
  border-bottom-color: var(--kiwi-600);
}

/* 首屏 */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(67, 160, 71, 0.35), transparent 60%),
    linear-gradient(160deg, var(--kiwi-900), var(--kiwi-800) 55%, var(--kiwi-700));
  padding: 88px 24px 82px;
}

.hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -90px;
  width: 54%;
  height: 210px;
  background: rgba(67, 160, 71, 0.12);
  transform: skewY(-7deg);
  pointer-events: none;
}

.hero-home { padding-top: 94px; padding-bottom: 90px; }
.hero-inner { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr); align-items: center; gap: 64px; }

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 20px;
  color: var(--lime);
  font-size: 0.76rem;
  font-weight: 760;
  letter-spacing: 0.13em;
}

.hero-kicker::before { content: ""; width: 24px; height: 1px; background: currentColor; }

.hero h1 {
  max-width: 13em;
  font-size: clamp(2.45rem, 5vw, 4.15rem);
  font-weight: 850;
  line-height: 1.13;
  letter-spacing: -0.045em;
}

.hero .tagline {
  max-width: 44em;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(1.02rem, 1.8vw, 1.18rem);
}

.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 11px 22px;
  font-size: 0.92rem;
  font-weight: 720;
  line-height: 1.35;
  text-decoration: none;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.btn:hover { transform: translateY(-2px); }
.btn-solid,
.btn-solid:visited { color: var(--kiwi-800); background: #fff; box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2); }
.btn-solid:hover { box-shadow: 0 16px 34px rgba(0, 0, 0, 0.25); }
.btn-ghost,
.btn-ghost:visited { color: #fff; border-color: rgba(255, 255, 255, 0.52); background: rgba(255, 255, 255, 0.04); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); }
.btn-text,
.btn-text:visited { min-height: 0; color: #fff; border: 0; border-bottom: 1px solid rgba(255,255,255,.4); border-radius: 0; padding: 8px 2px 5px; }
.btn-green,
.btn-green:visited { color: #fff; background: var(--kiwi-800); box-shadow: 0 10px 24px rgba(16, 58, 34, 0.18); }
.btn-outline,
.btn-outline:visited { color: var(--kiwi-800); border-color: var(--kiwi-700); background: transparent; }

.pilot-badge {
  margin-top: 30px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.82rem;
}

.pilot-badge span { width: 8px; height: 8px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 6px rgba(232, 245, 233, 0.12); }

/* 首页产品关系图 */
.hero-map {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 20px;
  background: rgba(5, 31, 17, 0.54);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.map-node { padding: 17px 18px; border: 1px solid rgba(255,255,255,.18); border-radius: 12px; background: rgba(255,255,255,.06); }
.map-node small { display: block; color: var(--kiwi-300); font-size: .69rem; font-weight: 700; letter-spacing: .1em; }
.map-node strong { display: block; margin-top: 4px; font-size: 1rem; }
.map-node span { display: block; margin-top: 3px; color: rgba(255,255,255,.6); font-size: .76rem; }
.map-kiwi { border-color: rgba(232, 245, 233, .55); background: rgba(232, 245, 233, .08); }
.map-line { height: 48px; display: grid; place-items: center; color: var(--kiwi-300); font-size: .7rem; }
.map-line::before, .map-line::after { content: ""; display: block; width: 1px; height: 8px; background: rgba(255,255,255,.38); }
.map-split { height: 36px; margin: 0 42px; border-top: 1px solid rgba(255,255,255,.32); display: flex; justify-content: space-between; }
.map-split i { width: 1px; height: 20px; background: rgba(255,255,255,.32); }
.map-merchants { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.map-merchants span { padding: 9px 5px; border: 1px solid rgba(255,255,255,.14); border-radius: 8px; background: rgba(255,255,255,.05); color: rgba(255,255,255,.78); font-size: .75rem; text-align: center; }

/* 通用内容 */
.section { padding: 82px 24px; }
.section-inner { max-width: var(--maxw); margin: 0 auto; }
.section-alt { background: var(--paper-soft); }
.section-dark { color: #fff; background: var(--kiwi-900); }

.kicker { color: var(--kiwi-700); font-size: .75rem; font-weight: 760; letter-spacing: .14em; }
.kicker-light { color: var(--kiwi-300); }
h2 { max-width: 19em; margin-top: 12px; font-size: clamp(1.8rem, 3.6vw, 2.75rem); font-weight: 820; line-height: 1.22; letter-spacing: -.035em; }
.lead { max-width: 45em; margin-top: 16px; color: var(--ink-soft); font-size: 1.05rem; }
.light-lead { color: rgba(255,255,255,.7); }
.nowrap { white-space: nowrap; }

/* 买家接入方式 */
.surface-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.surface-card { position: relative; min-height: 335px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); display: flex; flex-direction: column; align-items: flex-start; }
.surface-card-strong { border-color: var(--kiwi-600); background: var(--kiwi-50); }
.surface-index { position: absolute; top: 25px; right: 27px; color: #afbaaf; font-family: Georgia, serif; font-size: 1.25rem; }
.surface-label { color: var(--kiwi-700); font-size: .72rem; font-weight: 760; letter-spacing: .1em; }
.surface-card h3 { max-width: 11em; margin-top: 24px; font-size: 1.28rem; line-height: 1.3; }
.surface-card p { margin-top: 13px; color: var(--ink-soft); font-size: .91rem; }
.surface-card .surface-cta { margin-top: auto; padding-top: 24px; font-size: .86rem; font-weight: 720; line-height: 1.55; text-decoration: none; }

/* 流程 */
.process-line { display: grid; grid-template-columns: repeat(auto-fit, minmax(165px, 1fr)); margin-top: 44px; border-top: 1px solid var(--line-dark); }
.process-line > div { position: relative; min-height: 176px; padding: 30px 20px 0 0; }
.process-line > div::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; background: var(--lime); transform: rotate(45deg); }
.process-line b { display: block; color: var(--kiwi-300); font-family: Georgia, serif; font-size: .85rem; }
.process-line strong { display: block; margin-top: 14px; font-size: .98rem; }
.process-line span { display: block; max-width: 15em; margin-top: 8px; color: rgba(255,255,255,.57); font-size: .82rem; }
.process-light { border-top-color: var(--line); }
.process-light > div::before { background: var(--kiwi-600); }
.process-light b { color: var(--kiwi-700); }
.process-light strong { color: var(--ink); }
.process-light span { color: var(--ink-soft); }

/* 边界、证据与行动区 */
.boundary-layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(360px, 1.1fr); gap: 88px; align-items: start; }
.boundary-list { border-top: 1px solid var(--line); }
.boundary-list > div { display: grid; grid-template-columns: minmax(120px, .6fr) 1fr; gap: 24px; padding: 19px 0; border-bottom: 1px solid var(--line); }
.boundary-list span { color: var(--kiwi-800); font-weight: 750; }
.boundary-list p { color: var(--ink-soft); font-size: .9rem; }
.boundary-list-dark { border-color: var(--line-dark); }
.boundary-list-dark > div { border-color: var(--line-dark); }
.boundary-list-dark span { color: var(--lime); }
.boundary-list-dark p { color: rgba(255,255,255,.62); }

.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 42px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.evidence-grid > div { padding: 28px 28px 28px 0; border-right: 1px solid var(--line); }
.evidence-grid > div + div { padding-left: 28px; }
.evidence-grid > div:last-child { border-right: 0; }
.evidence-grid strong { display: block; color: var(--kiwi-800); font-family: Georgia, serif; font-size: clamp(2rem, 4vw, 3.1rem); font-weight: 600; line-height: 1; }
.evidence-grid span { display: block; margin-top: 11px; color: var(--ink-soft); font-size: .84rem; }

.notice { max-width: 52em; margin-top: 32px; border-left: 4px solid var(--kiwi-600); border-radius: 0 10px 10px 0; padding: 18px 21px; background: var(--kiwi-100); color: var(--ink-soft); font-size: .9rem; }
.notice strong { color: var(--kiwi-900); }
.evidence-note { max-width: none; }
.dark-note { margin-top: 28px; border-left: 3px solid var(--lime); padding: 12px 18px; color: rgba(255,255,255,.67); font-size: .9rem; }

.cta-band { padding: 60px 24px; color: #fff; background: var(--kiwi-800); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-inner h2 { margin-top: 8px; }
.cta-inner .hero-actions { margin-top: 0; }

/* 买家页 */
.host-visual { padding: 25px; border: 1px solid rgba(255,255,255,.18); border-radius: 18px; background: rgba(6,31,17,.52); box-shadow: var(--shadow); }
.host-chat { max-width: 90%; border-radius: 14px 14px 14px 3px; padding: 17px 19px; background: #fff; color: var(--ink); }
.host-chat span { color: var(--kiwi-700); font-size: .7rem; font-weight: 760; }
.host-chat p { margin-top: 4px; font-size: .9rem; }
.host-route { padding: 18px 0 18px 22px; color: var(--kiwi-300); font-size: .72rem; }
.host-kiwi { padding: 20px; border: 1px solid rgba(232,245,233,.48); border-radius: 12px; background: rgba(232,245,233,.08); }
.host-kiwi small, .host-kiwi strong, .host-kiwi span { display: block; }
.host-kiwi small { color: var(--lime); font-size: .7rem; }
.host-kiwi strong { margin-top: 7px; font-size: .96rem; }
.host-kiwi span { margin-top: 5px; color: rgba(255,255,255,.58); font-size: .75rem; }
.host-install { width: 100%; margin-top: auto; padding-top: 22px; border-top: 1px solid var(--line); }
.host-install pre { width: 100%; margin-top: 12px; padding: 13px 14px; border-left-width: 3px; font-size: .72rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.host-install > span { display: block; margin-top: 12px; color: var(--ink-soft); font-size: .78rem; }

.tool-flow { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 38px; }
.tool-flow span { padding: 11px 14px; border: 1px solid rgba(255,255,255,.19); border-radius: 8px; background: rgba(255,255,255,.06); font-size: .82rem; font-weight: 650; }
.tool-flow i { color: var(--kiwi-300); font-style: normal; }

/* 商家页 */
.merchant-runtime { padding: 24px; border: 1px solid rgba(255,255,255,.2); border-radius: 18px; background: rgba(5,31,17,.6); box-shadow: var(--shadow); }
.runtime-head { display: flex; justify-content: space-between; color: rgba(255,255,255,.58); font-size: .72rem; }
.runtime-head b { color: var(--lime); font-weight: 650; }
.merchant-runtime > h3 { margin: 18px 0; font-size: 1.35rem; }
.runtime-metrics { border-top: 1px solid var(--line-dark); }
.runtime-metrics > div { display: grid; grid-template-columns: 112px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line-dark); }
.runtime-metrics strong { font-size: .8rem; }
.runtime-metrics span { color: rgba(255,255,255,.58); font-size: .75rem; }
.runtime-rfq { margin-top: 20px; border-left: 3px solid var(--lime); padding: 13px 15px; background: rgba(255,255,255,.07); }
.runtime-rfq small, .runtime-rfq b, .runtime-rfq span { display: block; }
.runtime-rfq small { color: var(--kiwi-300); font-size: .68rem; }
.runtime-rfq b { margin-top: 4px; font-size: .87rem; }
.runtime-rfq span { margin-top: 3px; color: rgba(255,255,255,.55); font-size: .72rem; }

.pilot-layout { display: grid; grid-template-columns: 1fr 330px; column-gap: 80px; row-gap: 30px; align-items: center; }
.pilot-actions { display: flex; flex-direction: column; gap: 12px; }
.pilot-actions span { color: var(--ink-soft); font-size: .84rem; text-align: center; }
/* 商家页 CTA 下方的联系二维码：作为网格第三行，展开不牵动第一行的居中 */
.contact-qr-inline > summary { color: var(--kiwi-700); font-weight: 650; font-size: .84rem; cursor: pointer; }

/* 对外安装路径：先展示最短可执行路径，技术细节不挡住首次接入 */
.quickstart-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: 40px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.quickstart-step { min-height: 275px; padding: 27px; border-right: 1px solid var(--line); display: flex; flex-direction: column; align-items: flex-start; }
.quickstart-step:last-child { border-right: 0; }
.quickstart-number { color: var(--kiwi-700); font-family: Georgia, serif; font-size: 1.25rem; }
.quickstart-step .surface-label { margin-top: 24px; }
.quickstart-step h3 { margin-top: 8px; font-size: 1.08rem; }
.quickstart-step p { margin-top: 12px; color: var(--ink-soft); font-size: .88rem; }
.quickstart-code { width: 100%; margin-top: auto; padding: 13px 14px; border-left-width: 3px; font-size: .72rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.quickstart-link { margin-top: auto; padding-top: 22px; font-size: .86rem; font-weight: 720; text-decoration: none; }
.quickstart-note { margin-top: 28px; border-left: 4px solid var(--kiwi-600); border-radius: 0 10px 10px 0; padding: 17px 20px; background: var(--kiwi-100); color: var(--ink-soft); font-size: .9rem; }
.quickstart-note strong { color: var(--kiwi-900); }

/* 开发者页 */
.architecture-stack { max-width: 900px; margin-top: 40px; }
.architecture-row { display: grid; grid-template-columns: 240px 1fr; gap: 34px; align-items: center; border: 1px solid var(--line); border-radius: 12px; padding: 22px 26px; background: var(--paper); }
.architecture-row p { color: var(--ink-soft); font-size: .9rem; }
.architecture-name small, .architecture-name strong { display: block; }
.architecture-name small { color: var(--kiwi-700); font-size: .68rem; font-weight: 760; letter-spacing: .1em; }
.architecture-name strong { margin-top: 4px; font-size: 1rem; }
.architecture-accent { border-color: var(--kiwi-600); background: var(--kiwi-50); }
.architecture-strong { color: #fff; border-color: var(--kiwi-900); background: var(--kiwi-900); }
.architecture-strong p { color: rgba(255,255,255,.64); }
.architecture-strong .architecture-name small { color: var(--kiwi-300); }
.architecture-arrow { padding: 10px 0 10px 260px; color: var(--kiwi-700); font-size: .72rem; }

.protocol-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 38px; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.protocol-grid > div { min-height: 150px; padding: 24px 20px; border-right: 1px solid var(--line-dark); }
.protocol-grid > div:last-child { border-right: 0; }
.protocol-grid strong { display: block; color: var(--lime); font-family: Georgia, serif; font-size: 1.45rem; }
.protocol-grid span { display: block; margin-top: 13px; color: rgba(255,255,255,.62); font-size: .82rem; }

.repo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; }
.repo-card, .repo-card:visited { min-height: 210px; border: 1px solid var(--line); border-radius: 12px; padding: 24px; color: var(--ink); text-decoration: none; transition: border-color 140ms ease, transform 140ms ease; }
.repo-card:hover { border-color: var(--kiwi-600); transform: translateY(-2px); }
.repo-card strong, .repo-card span { display: block; }
.repo-card strong { font-size: 1rem; }
.repo-card span { margin-top: 7px; color: var(--kiwi-700); font-size: .72rem; font-weight: 700; }
.repo-card p { margin-top: 25px; color: var(--ink-soft); font-size: .86rem; }

.status-matrix { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 38px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--paper); }
.status-matrix > div { padding: 25px; border-right: 1px solid var(--line); }
.status-matrix > div:last-child { border-right: 0; }
.status-matrix span { color: var(--kiwi-800); font-size: .76rem; font-weight: 760; letter-spacing: .08em; }
.status-matrix p { margin-top: 10px; color: var(--ink-soft); font-size: .87rem; }

/* 表格与代码 */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; margin-top: 30px; border-collapse: collapse; font-size: .9rem; }
th, td { min-width: 190px; border-bottom: 1px solid var(--line); padding: 15px 16px; text-align: left; vertical-align: top; }
th { color: var(--kiwi-800); font-weight: 750; white-space: nowrap; }
td:first-child { min-width: 150px; font-weight: 650; white-space: nowrap; }

pre { margin-top: 28px; overflow-x: auto; border: 1px solid var(--line); border-left: 4px solid var(--kiwi-600); border-radius: 0 12px 12px 0; padding: 23px 25px; background: #edf5ed; color: var(--kiwi-950); font-size: .82rem; line-height: 1.7; }
code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 42px 24px 54px; background: var(--paper-soft); color: var(--ink-soft); font-size: .84rem; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; }
.footer .row { display: flex; justify-content: space-between; gap: 36px; flex-wrap: wrap; }
.footer p + p { margin-top: 5px; }
.footer a { font-weight: 650; text-decoration: none; }
.footer details.contact-qr-box { margin-top: 5px; }
.footer .contact-qr-box > summary { color: var(--kiwi-700); font-weight: 650; cursor: pointer; }
.footer .contact-qr { display: block; margin-top: 8px; width: 150px; height: auto; border-radius: 8px; background: #fff; border: 1px solid var(--line); }

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero h1 { max-width: 15em; }
  .hero-map, .host-visual, .merchant-runtime { max-width: 650px; }
  .surface-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .surface-card { min-height: 300px; }
  .quickstart-grid { grid-template-columns: 1fr; }
  .quickstart-step { border-right: 0; }
  .quickstart-step:nth-child(n+3) { border-bottom: 1px solid var(--line); }
  .quickstart-step:last-child { border-bottom: 0; }
  .quickstart-step { min-height: 220px; border-right: 0; border-bottom: 1px solid var(--line); }
  .quickstart-step:last-child { border-bottom: 0; }
  .boundary-layout { grid-template-columns: 1fr; gap: 42px; }
  .protocol-grid { grid-template-columns: repeat(2, 1fr); }
  .protocol-grid > div:nth-child(2) { border-right: 0; }
  .protocol-grid > div:nth-child(-n+2) { border-bottom: 1px solid var(--line-dark); }
  .repo-grid, .status-matrix { grid-template-columns: 1fr; }
  .status-matrix > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .status-matrix > div:last-child { border-bottom: 0; }
  .pilot-layout { grid-template-columns: 1fr; gap: 36px; }
  .pilot-actions { max-width: 360px; }
}

@media (max-width: 680px) {
  :root { font-size: 16px; }
  .nav-inner { min-height: 0; padding: 10px 18px 0; flex-wrap: wrap; gap: 5px 18px; }
  .nav-logo { padding: 6px 0 3px; }
  .nav-links { width: calc(100% + 36px); margin: 0 -18px; padding: 0 18px; gap: 20px; overflow-x: auto; scrollbar-width: none; }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a, .nav-links a:visited { padding: 11px 0 9px; font-size: .82rem; }
  .hero, .hero-home { padding: 66px 20px 62px; }
  .hero h1 { font-size: clamp(2.15rem, 11vw, 3.25rem); }
  .hero-grid { gap: 38px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .btn-text { width: fit-content !important; }
  .section { padding: 62px 20px; }
  .surface-grid { grid-template-columns: 1fr; }
  .surface-card { min-height: 0; padding: 25px; }
  .process-line { display: block; margin-left: 5px; border-top: 0; border-left: 1px solid currentColor; }
  .process-line > div { min-height: 0; padding: 0 0 30px 27px; }
  .process-line > div:last-child { padding-bottom: 0; }
  .process-line > div::before { top: 8px; left: -5px; }
  .boundary-list > div { grid-template-columns: 1fr; gap: 4px; }
  .evidence-grid { grid-template-columns: 1fr; }
  .evidence-grid > div, .evidence-grid > div + div { border-right: 0; border-bottom: 1px solid var(--line); padding: 22px 0; }
  .evidence-grid > div:last-child { border-bottom: 0; }
  .cta-inner { align-items: flex-start; flex-direction: column; }
  .cta-inner .hero-actions { width: 100%; }
  .tool-flow { align-items: stretch; flex-direction: column; }
  .tool-flow i { transform: rotate(90deg); align-self: flex-start; margin-left: 24px; }
  .architecture-row { grid-template-columns: 1fr; gap: 10px; padding: 20px; }
  .architecture-arrow { padding-left: 20px; }
  .protocol-grid { grid-template-columns: 1fr; }
  .protocol-grid > div { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .protocol-grid > div:last-child { border-bottom: 0; }
  .runtime-metrics > div { grid-template-columns: 1fr; gap: 2px; }
  .repo-grid { gap: 12px; }
  pre { margin-left: -4px; padding: 20px 18px; font-size: .76rem; }
  .footer .row { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}