/* =========================================================
   MAI 制造业 AI 助手 — 官网样式
   设计语言：工业蓝为主色 + 信号橙为强调，中性冷灰蓝底
   去除 AI 模板化的紫/霓虹渐变，转向稳健、可信赖的专业气质
   ========================================================= */

:root {
  --bg: #0b1016;
  --bg-2: #0f161e;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #eef2f7;
  --text-dim: #98a4b4;
  --text-mute: #6b7686;
  --brand: #2f6bff;
  --brand-2: #1e63d6;
  --accent: #f97316;
  --ok: #2dd4a7;
  --grad: linear-gradient(120deg, #3b7bff 0%, #1e63d6 100%);
  --grad-soft: linear-gradient(120deg, rgba(47,107,255,0.12), rgba(249,115,22,0.06));
  --shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6);
  --radius: 16px;
  --maxw: 1180px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
}

[data-theme="light"] {
  --bg: #f4f6fa;
  --bg-2: #eaeef5;
  --surface: rgba(255, 255, 255, 0.75);
  --surface-2: #ffffff;
  --border: rgba(15, 23, 42, 0.10);
  --border-strong: rgba(15, 23, 42, 0.18);
  --text: #0f1b2d;
  --text-dim: #475066;
  --text-mute: #6b7686;
  --shadow: 0 24px 50px -24px rgba(30, 58, 138, 0.25);
  --grad-soft: linear-gradient(120deg, rgba(47,107,255,0.10), rgba(249,115,22,0.05));
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

a { color: inherit; text-decoration: none; }
.icon { width: 1.25em; height: 1.25em; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; display: inline-block; vertical-align: -0.22em; }

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 0.95rem;
  padding: 12px 22px; border-radius: 999px; cursor: pointer;
  border: 1px solid transparent; transition: transform 0.18s ease, box-shadow 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}
.btn .icon { width: 1.1em; height: 1.1em; }
.btn--sm { padding: 9px 18px; font-size: 0.88rem; }
.btn--block { width: 100%; justify-content: center; }
.btn--primary { background: var(--grad); color: #fff; box-shadow: 0 10px 30px -10px rgba(47,107,255,0.7); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(47,107,255,0.85); }
.btn--ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--border-strong); transform: translateY(-2px); background: var(--surface-2); }

/* ---------- Navbar ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.nav.scrolled { border-color: var(--border); }
.nav__inner { max-width: var(--maxw); margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; gap: 20px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; }
.brand__mark {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: var(--grad); color: #fff; box-shadow: 0 8px 22px -8px rgba(47,107,255,0.8);
}
.brand__mark .icon { width: 22px; height: 22px; stroke-width: 1.9; }
.brand__text { font-size: 1.18rem; letter-spacing: 0.5px; display: flex; flex-direction: column; line-height: 1; }
.brand__text small { font-size: 0.62rem; font-weight: 500; color: var(--text-dim); letter-spacing: 1.5px; margin-top: 4px; }
.nav__links { display: flex; gap: 26px; margin-left: auto; font-size: 0.92rem; color: var(--text-dim); }
.nav__links a { transition: color 0.2s; position: relative; padding: 4px 0; }
.nav__links a:hover { color: var(--text); }
.nav__links a::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px; background: var(--grad); transition: width 0.25s; }
.nav__links a:hover::after { width: 100%; }
.nav__links a.is-active { color: var(--text); }
.nav__links a.is-active::after { width: 100%; }
.nav__actions { display: flex; align-items: center; gap: 12px; margin-left: 8px; }
.theme-toggle {
  width: 40px; height: 40px; border-radius: 11px; cursor: pointer; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-dim); transition: 0.2s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.nav__burger { display: none; width: 40px; height: 40px; border-radius: 11px; background: var(--surface); border: 1px solid var(--border); color: var(--text); cursor: pointer; }
.nav__burger .icon { width: 22px; height: 22px; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 150px 0 90px; overflow: hidden; }
.hero--page { padding: 160px 0 70px; }
.hero--page .hero__copy { position: relative; z-index: 1; max-width: 720px; text-align: center; margin: 0 auto; }
.hero--page .hero__lead { margin-left: auto; margin-right: auto; }
.hero__aurora { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.4; }
.orb--1 { width: 560px; height: 560px; background: radial-gradient(circle, rgba(47,107,255,0.5), transparent 70%); top: -200px; left: -150px; animation: float1 18s ease-in-out infinite; }
.orb--2 { display: none; }
.orb--3 { display: none; }
.grid-overlay { position: absolute; inset: 0; background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px); background-size: 46px 46px; mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%); opacity: 0.4; }
[data-theme="light"] .grid-overlay { opacity: 0.35; }
@keyframes float1 { 50% { transform: translate(60px, 50px); } }
@keyframes float2 { 50% { transform: translate(-50px, 40px); } }
@keyframes float3 { 50% { transform: translate(40px, -40px); } }

.hero__inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 7px 15px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); font-size: 0.82rem; color: var(--text-dim); margin-bottom: 22px; }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px rgba(52,211,153,0.18); }
.hero__title { font-size: clamp(2.3rem, 5vw, 3.7rem); line-height: 1.1; font-weight: 800; letter-spacing: -0.5px; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; display: inline-block; }
.hero__slogan { font-size: clamp(1.1rem, 2.4vw, 1.5rem); font-weight: 600; margin: 16px 0 18px; color: var(--text); }
.hero__lead { color: var(--text-dim); font-size: 1.05rem; max-width: 560px; }
.hero__cta { display: flex; gap: 14px; margin: 30px 0 26px; flex-wrap: wrap; }
.hero__chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 26px; }
.hero__chips li { font-size: 0.9rem; color: var(--text-dim); }
.hero__chips strong { color: var(--text); font-size: 1.15rem; font-weight: 800; }

/* Chat mockup */
.hero__visual { display: flex; justify-content: center; }
.chat { width: 100%; max-width: 440px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow); backdrop-filter: blur(8px); overflow: hidden; }
.chat__bar { display: flex; gap: 7px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.chat__bar span { width: 11px; height: 11px; border-radius: 50%; background: var(--border-strong); }
.chat__bar span:nth-child(1){ background:#ff5f57; } .chat__bar span:nth-child(2){ background:#febc2e; } .chat__bar span:nth-child(3){ background:#28c840; }
.chat__body { padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.msg { max-width: 88%; padding: 12px 14px; border-radius: 14px; font-size: 0.9rem; }
.msg--user { align-self: flex-end; background: var(--grad); color: #fff; border-bottom-right-radius: 4px; }
.msg--bot { align-self: flex-start; background: var(--surface); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg__tag { display: inline-block; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.4px; color: var(--brand-2); margin-bottom: 6px; text-transform: uppercase; }
.msg--bot p { margin: 4px 0; }
.msg--bot ol { margin: 4px 0 4px 18px; }
.msg__hint { font-size: 0.82rem; color: var(--text-dim); }
.msg__iso { font-size: 0.74rem; color: var(--text-mute); border-top: 1px dashed var(--border); padding-top: 6px; margin-top: 6px; }
.chart-mini { display: flex; align-items: flex-end; gap: 7px; height: 70px; margin: 8px 0; }
.chart-mini span { flex: 1; height: var(--h); border-radius: 5px 5px 0 0; background: var(--grad); opacity: 0.85; }

.scroll-cue { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); width: 26px; height: 42px; border: 2px solid var(--border-strong); border-radius: 14px; z-index: 2; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; background: var(--text-dim); border-radius: 2px; transform: translateX(-50%); animation: cue 1.8s infinite; }
@keyframes cue { 0%{opacity:0;transform:translate(-50%,0)} 40%{opacity:1} 100%{opacity:0;transform:translate(-50%,14px)} }

/* ---------- Stats band ---------- */
.stats { padding: 8px 0 10px; }
.stats__grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; background: var(--grad-soft); border: 1px solid var(--border); border-radius: 22px; padding: 30px 26px; }
.stat { text-align: center; }
.stat__num { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat__num span { font-size: 0.6em; }
.stat__label { font-size: 0.82rem; color: var(--text-dim); margin-top: 4px; line-height: 1.4; }

/* ---------- Sections ---------- */
.section { padding: 92px 0; }
.section--alt { background: var(--bg-2); }
.section__head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.kicker { display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.section__head h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 800; letter-spacing: -0.4px; }
.section__head p { color: var(--text-dim); margin-top: 14px; font-size: 1.02rem; }

/* ---------- Cards ---------- */
.cards { display: grid; gap: 22px; }
.cards--5 { grid-template-columns: repeat(5, 1fr); }
.cards--4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; transition: transform 0.25s ease, border-color 0.25s, background 0.25s; }
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); background: var(--surface-2); }
.card__icon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--border); color: var(--brand-2); margin-bottom: 16px; }
.card__icon .icon { width: 24px; height: 24px; }
.card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.card p { color: var(--text-dim); font-size: 0.93rem; }

/* ---------- Agent grid ---------- */
.agent-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.agent { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px 18px; transition: transform 0.22s, border-color 0.22s, background 0.22s; }
.agent:hover { transform: translateY(-5px); border-color: var(--border-strong); background: var(--surface-2); }
.agent__ic { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--border); color: var(--brand); margin-bottom: 12px; }
.agent__ic .icon { width: 21px; height: 21px; }
.agent h4 { font-size: 1rem; margin-bottom: 6px; }
.agent p { color: var(--text-dim); font-size: 0.85rem; }
.agent__tier { position: absolute; top: 16px; right: 16px; font-size: 0.66rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); }
.agent__tier--star { background: var(--grad); color: #fff; border-color: transparent; }
.agent-note { text-align: center; margin-top: 28px; color: var(--text-dim); font-size: 0.92rem; }
.agent-note strong { color: var(--text); }

/* ---------- Flywheel ---------- */
.flywheel { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.flywheel__lead { color: var(--text-dim); margin: 14px 0 22px; }
.flywheel__list { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.flywheel__list li { display: flex; gap: 11px; align-items: flex-start; font-size: 0.96rem; }
.flywheel__list .icon { color: var(--ok); flex: none; width: 22px; height: 22px; margin-top: 2px; }
.flywheel__list strong { color: var(--text); }
.flywheel__viz { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.wheel { width: 100%; max-width: 340px; }
.wheel__spin { transform-origin: 160px 160px; }
@keyframes spin { to { transform: rotate(360deg); } }
.wheel .node { fill: url(#wg); stroke: rgba(255,255,255,0.35); stroke-width: 1.5; }
.wheel__num { fill: #fff; font-size: 18px; font-weight: 800; text-anchor: middle; }
.wheel__center { fill: var(--text); font-size: 20px; font-weight: 800; }
.wheel__center-sub { fill: var(--text-dim); font-size: 11px; }
.wheel__labels { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 360px; }
.wheel__labels span { font-size: 0.82rem; padding: 6px 13px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--text-dim); }
.wheel__labels b { color: var(--accent); font-weight: 800; margin-right: 4px; }

/* ---------- Endpoints ---------- */
.endpoint-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.endpoint { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 22px 18px; text-align: center; transition: transform 0.22s, border-color 0.22s; }
.endpoint:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.endpoint--hl { border-color: color-mix(in srgb, var(--brand) 45%, var(--border)); background: var(--grad-soft); }
.endpoint__ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin: 0 auto 12px; background: var(--grad-soft); border: 1px solid var(--border); color: var(--brand-2); }
.endpoint__ic .icon { width: 23px; height: 23px; }
.endpoint h4 { font-size: 0.98rem; margin-bottom: 6px; }
.endpoint p { color: var(--text-dim); font-size: 0.82rem; min-height: 38px; }
.badge { display: inline-block; margin-top: 8px; font-size: 0.72rem; font-weight: 700; padding: 4px 11px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); }
.badge--ok { background: rgba(52,211,153,0.14); border-color: rgba(52,211,153,0.4); color: var(--ok); }

/* ---------- Architecture ---------- */
.arch { display: flex; flex-direction: column; gap: 10px; margin-bottom: 30px; }
.arch__layer { display: flex; align-items: center; gap: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 16px 20px; }
.arch__layer--app { border-color: color-mix(in srgb, var(--brand) 40%, var(--border)); background: var(--grad-soft); }
.arch__tag { flex: none; width: 168px; font-weight: 700; font-size: 0.9rem; color: var(--text); }
.arch__items { display: flex; flex-wrap: wrap; gap: 10px; }
.arch__items span { font-size: 0.84rem; padding: 6px 13px; border-radius: 9px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); }
.stack { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.stack__chip { font-size: 0.84rem; padding: 8px 15px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--text-dim); transition: 0.2s; }
.stack__chip:hover { color: var(--text); border-color: var(--border-strong); transform: translateY(-2px); }

/* ---------- Pricing ---------- */
.pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }
.plan { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 22px; padding: 30px 26px; transition: transform 0.25s, border-color 0.25s; }
.plan:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.plan--feature { border-color: color-mix(in srgb, var(--brand) 50%, var(--border)); background: var(--grad-soft); box-shadow: var(--shadow); }
.plan__flag { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); font-size: 0.74rem; font-weight: 700; padding: 5px 15px; border-radius: 999px; background: var(--grad); color: #fff; white-space: nowrap; }
.plan__name { font-size: 1.2rem; font-weight: 800; }
.plan__price { font-size: 2.6rem; font-weight: 800; margin: 12px 0 4px; letter-spacing: -1px; }
.plan__price .cur { font-size: 1.2rem; vertical-align: super; margin-right: 2px; }
.plan__price .unit { font-size: 0.9rem; font-weight: 500; color: var(--text-dim); letter-spacing: 0; }
.plan__desc { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 18px; }
.plan__feat { list-style: none; display: flex; flex-direction: column; gap: 11px; margin-bottom: 24px; }
.plan__feat li { display: flex; align-items: center; gap: 9px; font-size: 0.92rem; }
.plan__feat .icon { color: var(--ok); width: 19px; height: 19px; flex: none; }
.pricing__note { text-align: center; color: var(--text-dim); font-size: 0.88rem; margin-top: 28px; }

/* ---------- Cases / results ---------- */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 34px; }
.case { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 24px; transition: transform 0.22s, border-color 0.22s; }
.case:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.case__meta { font-size: 0.8rem; font-weight: 700; color: var(--brand); margin-bottom: 10px; }
.case p { color: var(--text-dim); font-size: 0.95rem; }
.results-band { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; background: var(--grad-soft); border: 1px solid var(--border); border-radius: 20px; padding: 28px 22px; text-align: center; }
.results-band strong { display: block; font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.results-band span { font-size: 0.8rem; color: var(--text-dim); margin-top: 4px; display: block; }

/* ---------- CTA / Contact ---------- */
.cta__inner { display: grid; grid-template-columns: 1fr 0.85fr; gap: 50px; align-items: center; }
.cta__copy h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 800; margin: 8px 0 14px; }
.cta__copy p { color: var(--text-dim); margin-bottom: 22px; }
.cta__list { list-style: none; display: flex; flex-direction: column; gap: 13px; }
.cta__list li { display: flex; align-items: center; gap: 11px; font-size: 0.98rem; }
.cta__list .icon { color: var(--brand-2); }
.cta__list a { border-bottom: 1px solid transparent; transition: 0.2s; }
.cta__list a:hover { border-color: var(--border-strong); }
.cta__form { background: var(--surface-2); border: 1px solid var(--border); border-radius: 20px; padding: 28px; box-shadow: var(--shadow); }
.cta__form h3 { font-size: 1.25rem; margin-bottom: 18px; }
.cta__form label { display: block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 14px; }
.cta__form input, .cta__form textarea {
  width: 100%; margin-top: 6px; padding: 11px 14px; border-radius: 11px; font-family: inherit; font-size: 0.95rem;
  background: var(--bg); border: 1px solid var(--border); color: var(--text); transition: border-color 0.2s; resize: vertical;
}
.cta__form input:focus, .cta__form textarea:focus { outline: none; border-color: var(--brand); }
.cta__form .btn { margin-top: 4px; }
.cta__hint { font-size: 0.78rem; color: var(--text-mute); margin-top: 12px; text-align: center; }
.cta__hint.ok { color: var(--ok); }

/* ---------- RCA 社区 ---------- */
.rca-toolbar { display: flex; gap: 14px; align-items: center; margin: 0 auto 30px; max-width: 860px; flex-wrap: wrap; }
.rca-search { position: relative; flex: 1; min-width: 240px; }
.rca-search .icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 17px; height: 17px; color: var(--text-mute); }
.rca-search input {
  width: 100%; padding: 11px 14px 11px 40px; border-radius: 12px; font-family: inherit; font-size: 0.95rem;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text); transition: border-color 0.2s;
}
.rca-search input:focus { outline: none; border-color: var(--brand); }
.rca-filters { display: flex; gap: 8px; }
.rca-filter {
  padding: 9px 18px; border-radius: 999px; cursor: pointer; font-size: 0.88rem; font-weight: 600;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-dim); transition: 0.2s;
}
.rca-filter:hover { color: var(--text); border-color: var(--border-strong); }
.rca-filter.is-active { background: var(--grad); color: #fff; border-color: transparent; }
.rca-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.rca-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 20px; display: flex; flex-direction: column; gap: 10px;
  transition: transform 0.22s ease, border-color 0.22s, background 0.22s;
}
.rca-card:hover { transform: translateY(-4px); border-color: var(--border-strong); background: var(--surface-2); }
.rca-card__head { display: flex; align-items: center; gap: 10px; }
.rca-card__icon { width: 20px; height: 20px; color: var(--brand-2); flex: none; }
.rca-card__head h3 { font-size: 1.05rem; font-weight: 700; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rca-badge { flex: none; font-size: 0.7rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); }
.rca-badge--official { background: var(--grad); color: #fff; border-color: transparent; }
.rca-card__desc { color: var(--text-dim); font-size: 0.9rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.rca-card__meta { font-size: 0.8rem; color: var(--text-mute); }
.rca-card__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.rca-tag { font-size: 0.74rem; padding: 3px 10px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); }
.rca-card__stats { display: flex; gap: 16px; margin-top: auto; padding-top: 4px; }
.rca-stat { display: inline-flex; align-items: center; gap: 5px; font-size: 0.84rem; color: var(--text-dim); }
.rca-stat .icon { width: 15px; height: 15px; color: var(--accent); }
.rca-empty { text-align: center; color: var(--text-mute); padding: 40px 0; grid-column: 1 / -1; }
.rca-status { text-align: center; color: var(--text-mute); font-size: 0.85rem; margin-top: 22px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 56px 0 26px; }
.footer__inner { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.footer__brand p { color: var(--text-dim); font-size: 0.9rem; margin-top: 14px; }
.brand--footer { margin-bottom: 0; }
.footer__col h5 { font-size: 0.85rem; letter-spacing: 1px; text-transform: uppercase; color: var(--text-mute); margin-bottom: 14px; }
.footer__col a { display: block; color: var(--text-dim); font-size: 0.92rem; padding: 5px 0; transition: color 0.2s; }
.footer__col a:hover { color: var(--text); }
.footer__bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--border); color: var(--text-mute); font-size: 0.82rem; }

/* ---------- To top ---------- */
.to-top { position: fixed; right: 24px; bottom: 24px; width: 46px; height: 46px; border-radius: 13px; background: var(--grad); color: #fff; border: none; cursor: pointer; display: grid; place-items: center; box-shadow: 0 12px 30px -10px rgba(47,107,255,0.8); opacity: 0; transform: translateY(16px); pointer-events: none; transition: 0.3s; z-index: 40; }
.to-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.to-top .icon { transform: rotate(-90deg); width: 20px; height: 20px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in-view { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .cards--5 { grid-template-columns: repeat(3, 1fr); }
  .endpoint-grid { grid-template-columns: repeat(3, 1fr); }
  .agent-grid { grid-template-columns: repeat(3, 1fr); }
  .stats__grid { grid-template-columns: repeat(3, 1fr); }
  .results-band { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__links.open {
    display: flex; flex-direction: column; gap: 4px; position: absolute; top: 68px; left: 16px; right: 16px;
    background: var(--surface-2); border: 1px solid var(--border); border-radius: 16px; padding: 14px; backdrop-filter: blur(14px);
  }
  .nav__links.open a { padding: 10px 12px; border-radius: 10px; }
  .nav__links.open a:hover { background: var(--surface); }
  .nav__burger { display: grid; }
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { order: -1; }
  .flywheel { grid-template-columns: 1fr; gap: 36px; }
  .cta__inner { grid-template-columns: 1fr; gap: 34px; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .arch__layer { flex-direction: column; align-items: flex-start; gap: 12px; }
  .arch__tag { width: auto; }
}
@media (max-width: 620px) {
  .section { padding: 66px 0; }
  .hero { padding: 120px 0 70px; }
  .cards--5, .cards--4, .agent-grid, .endpoint-grid, .pricing, .cases { grid-template-columns: 1fr; }
  .rca-list { grid-template-columns: 1fr; }
  .stats__grid, .results-band { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr; }
  .nav__actions .btn--sm { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}