/* ==========================================================================
   NexShell — 项目官网样式
   深色基调 · 与客户端一致的蓝色主色 (#2563EB)
   ========================================================================== */

:root{
  --bg:            #0B0F17;
  --bg-soft:       #0E141F;
  --panel:         #111827;
  --panel-2:       #0D1421;
  --line:          rgba(148,163,184,.14);
  --line-strong:   rgba(148,163,184,.26);
  --text:          #E8EDF7;
  --text-2:        #A9B6CB;
  --muted:         #7C8AA0;
  --blue:          #3B82F6;
  --blue-strong:   #2563EB;
  --blue-soft:     rgba(59,130,246,.13);
  --green:         #3DDC97;
  --green-soft:    rgba(61,220,151,.12);
  --amber:         #F5A524;
  --red:           #F2555A;
  --radius:        14px;
  --radius-lg:     20px;
  --shadow:        0 24px 60px -24px rgba(0,0,0,.8);
  --mono:          "JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  --sans:          "Segoe UI", system-ui, -apple-system, "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --wrap:          1160px;
}

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

[hidden]{ display:none !important; }

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

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

::selection{ background:rgba(59,130,246,.35); color:#fff; }

a{ color:inherit; text-decoration:none; }
p{ margin:0; }
h1,h2,h3{ margin:0; line-height:1.2; letter-spacing:-.02em; font-weight:650; }
code{ font-family:var(--mono); font-size:.92em; }

.wrap{ width:100%; max-width:var(--wrap); margin:0 auto; padding:0 28px; }
.wrap-narrow{ max-width:840px; }
.mono{ font-family:var(--mono); }

/* ---------------------------------------------------------------- 按钮 */
.btn{
  --btn-bg:transparent;
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding:11px 18px; border-radius:10px;
  font-size:14.5px; font-weight:600; letter-spacing:.01em;
  border:1px solid transparent; cursor:pointer;
  transition:transform .18s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
  white-space:nowrap;
}
.btn .i{ width:18px; height:18px; flex:0 0 18px; }
.btn-primary{
  background:linear-gradient(180deg,#4C8DF8,#2563EB);
  color:#fff;
  border-color:rgba(255,255,255,.14);
  box-shadow:0 10px 26px -12px rgba(37,99,235,.95), inset 0 1px 0 rgba(255,255,255,.22);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 16px 32px -12px rgba(37,99,235,1), inset 0 1px 0 rgba(255,255,255,.28); }
.btn-primary:active{ transform:translateY(0); }
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--line-strong);
  color:var(--text);
}
.btn-ghost:hover{ background:rgba(255,255,255,.08); border-color:rgba(255,255,255,.34); transform:translateY(-2px); }
.btn-sm{ padding:8px 14px; font-size:13.5px; border-radius:9px; }
.btn-sm .i{ width:16px; height:16px; flex-basis:16px; }
.btn-lg{ padding:14px 24px; font-size:15.5px; border-radius:12px; }

/* ---------------------------------------------------------------- 导航 */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:60;
  background:rgba(11,15,23,.72);
  border-bottom:1px solid transparent;
  backdrop-filter:blur(14px) saturate(150%);
  transition:background .25s ease, border-color .25s ease;
}
.nav.scrolled{ background:rgba(9,13,20,.9); border-bottom-color:var(--line); }
.nav-inner{ height:68px; display:flex; align-items:center; gap:24px; }

.brand{ display:inline-flex; align-items:center; gap:10px; }
.brand-mark{
  width:32px; height:32px; border-radius:9px;
  display:grid; place-items:center; color:#fff;
  background:linear-gradient(145deg,#3B82F6,#1D4ED8);
  box-shadow:0 6px 16px -6px rgba(37,99,235,.9), inset 0 1px 0 rgba(255,255,255,.25);
}
.brand-mark svg{ width:22px; height:22px; }
.brand-text{ font-size:18px; font-weight:700; letter-spacing:-.01em; }
.brand-text em{ font-style:normal; color:var(--blue); }

.nav-links{ display:flex; align-items:center; gap:4px; margin-left:auto; }
.nav-links a{
  padding:8px 12px; border-radius:8px;
  color:var(--text-2); font-size:14px;
  transition:color .18s ease, background .18s ease;
}
.nav-links a:hover{ color:var(--text); background:rgba(255,255,255,.05); }
.nav-links a.active{ color:#fff; background:rgba(59,130,246,.14); }

.nav-actions{ display:flex; align-items:center; gap:10px; }
.nav-toggle{
  display:none; width:40px; height:40px; border-radius:9px;
  background:rgba(255,255,255,.05); border:1px solid var(--line);
  cursor:pointer; padding:0; place-items:center;
}
.nav-toggle span{ display:block; width:17px; height:1.5px; background:var(--text); border-radius:2px; margin:3.5px auto; transition:.2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-5px) rotate(-45deg); }

/* ---------------------------------------------------------------- Hero */
.hero{ position:relative; padding:136px 0 76px; overflow:hidden; }
.hero-glow{
  position:absolute; inset:-20% -10% auto -10%; height:720px;
  background:
    radial-gradient(46% 46% at 22% 34%, rgba(37,99,235,.30), transparent 70%),
    radial-gradient(34% 34% at 78% 12%, rgba(61,220,151,.13), transparent 72%);
  filter:blur(20px); pointer-events:none;
}
.hero-grid{
  position:absolute; inset:0;
  background-image:linear-gradient(rgba(148,163,184,.055) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(148,163,184,.055) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 78%);
  pointer-events:none;
}
.hero-inner{
  position:relative; display:grid; grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  gap:56px; align-items:center;
}

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 12px 6px 10px; margin-bottom:22px;
  border:1px solid var(--line); border-radius:999px;
  background:rgba(255,255,255,.035);
  font-size:12.5px; letter-spacing:.06em; color:var(--text-2);
}
.eyebrow .dot{ width:6px; height:6px; border-radius:50%; background:var(--green); box-shadow:0 0 0 4px rgba(61,220,151,.16); }

.hero h1{ font-size:clamp(38px,5vw,62px); font-weight:700; letter-spacing:-.035em; }
.grad{
  background:linear-gradient(100deg,#8AB4FF 0%,#3B82F6 45%,#3DDC97 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.lede{ margin-top:22px; max-width:31em; color:var(--text-2); font-size:16.5px; line-height:1.8; }
.lede strong{ color:var(--text); font-weight:600; }

.hero-cta{ display:flex; flex-wrap:wrap; gap:12px; margin-top:32px; }
.hero-meta{
  display:flex; flex-wrap:wrap; gap:8px 22px; margin:26px 0 0; padding:0; list-style:none;
  color:var(--muted); font-size:13px;
}
.hero-meta li{ display:flex; align-items:center; gap:7px; }
.hero-meta li::before{ content:""; width:4px; height:4px; border-radius:50%; background:var(--line-strong); }

/* ---------------------------------------------------------- 终端示意 */
.hero-visual{ position:relative; }
.term-window{
  position:relative;
  border:1px solid var(--line-strong); border-radius:var(--radius-lg);
  background:linear-gradient(180deg,#121A28,#0C131F 72%);
  box-shadow:var(--shadow), 0 0 0 1px rgba(0,0,0,.4), 0 0 90px -40px rgba(59,130,246,.75);
  overflow:visible;
}
.term-head{
  display:flex; align-items:center; gap:14px;
  padding:10px 14px; border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.018);
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;
}
.term-dots{ display:flex; gap:6px; }
.term-dots i{ width:9px; height:9px; border-radius:50%; background:#2B3546; }
.term-dots i:nth-child(1){ background:#3B4456; }
.term-dots i:nth-child(2){ background:#33405A; }
.term-dots i:nth-child(3){ background:#2C3A52; }
.term-tabs{ display:flex; align-items:center; gap:3px; font-size:11.5px; }
.term-tab{
  display:inline-flex; align-items:center; gap:6px;
  padding:5px 10px; border-radius:6px; color:var(--muted);
}
.term-tab.active{ background:rgba(59,130,246,.14); color:#DCE8FF; }
.term-tab.add{ color:var(--muted); }
.term-tab .live{ width:5px; height:5px; border-radius:50%; background:var(--green); }
.term-tab i:not(.live){ width:5px; height:5px; border-radius:50%; background:#3A4558; }
.term-badge{ margin-left:auto; color:var(--muted); font-size:10.5px; letter-spacing:.05em; }

.term-body{ padding:18px 18px 22px; font-size:12.5px; line-height:1.95; color:#C6D2E4; }
.term-body .ln{ white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.term-body .dim{ color:#7E8CA3; }
.term-body .gap{ height:6px; }
.term-body .u{ color:#7FB2FF; }
.term-body .p{ color:#6E7F97; }
.term-body .d{ color:#3DDC97; }
.term-body .red{ color:#FF7A7F; }
.term-body .green{ color:#3DDC97; }
.term-body .typed{ color:#EDF3FF; }
.term-body .hint{ color:#66768D; font-size:11px; margin-top:2px; }
.caret{
  display:inline-block; width:6px; height:13px; margin-left:3px;
  background:#7FB2FF; vertical-align:-2px;
  animation:blink 1.15s steps(2,start) infinite;
}
@keyframes blink{ 0%,49%{ opacity:1 } 50%,100%{ opacity:0 } }

.ai-float{
  position:absolute; right:-16px; bottom:-42px; width:78%;
  border:1px solid rgba(59,130,246,.34); border-radius:14px;
  background:linear-gradient(180deg,rgba(23,34,52,.98),rgba(14,21,33,.98));
  box-shadow:0 26px 50px -22px rgba(0,0,0,.95), 0 0 0 1px rgba(0,0,0,.3);
  padding:14px 15px 13px;
  backdrop-filter:blur(8px);
}
.ai-float-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:10px; }
.ai-chip{
  font-size:10.5px; letter-spacing:.08em; font-weight:600;
  color:#BFD7FF; background:var(--blue-soft);
  border:1px solid rgba(59,130,246,.3);
  padding:3px 8px; border-radius:5px;
}
.ai-state{ display:inline-flex; align-items:center; gap:6px; font-size:10.5px; color:var(--muted); }
.ai-state i{ width:5px; height:5px; border-radius:50%; background:var(--green); }
.ai-plan{ list-style:none; margin:0; padding:0; display:grid; gap:6px; }
.ai-plan li{
  display:flex; align-items:center; gap:8px;
  font-size:11px; color:#9CABC2;
}
.ai-plan li code{
  font-size:10.5px; color:#CBD8EA;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
.ai-plan li em{ margin-left:auto; font-style:normal; font-size:10px; color:var(--amber); white-space:nowrap; }
.ai-plan .ok{ color:var(--green); font-size:10px; }
.ai-plan .wait{ color:#E7C88C; }
.ai-plan .wait > span:first-child{ color:var(--amber); font-size:10px; }
.ai-note{
  margin-top:10px; padding-top:9px; border-top:1px dashed rgba(148,163,184,.18);
  font-size:11px; color:#9FB0C7; line-height:1.65;
}
.ai-note code{ color:#D7E6FF; }
.visual-caption{ margin-top:58px; text-align:right; color:#5D6B80; font-size:11px; letter-spacing:.06em; }

/* ---------------------------------------------------------------- 数字条 */
.stats{ border-block:1px solid var(--line); background:rgba(255,255,255,.014); }
.stats-grid{ display:grid; grid-template-columns:repeat(4,1fr); }
.stat{
  padding:30px 26px; display:flex; align-items:baseline; gap:14px;
  border-left:1px solid var(--line);
}
.stat:first-child{ border-left:none; padding-left:0; }
.stat b{
  font-size:38px; font-weight:700; letter-spacing:-.04em;
  background:linear-gradient(180deg,#fff,#8FB7F5);
  -webkit-background-clip:text; background-clip:text; color:transparent;
  font-variant-numeric:tabular-nums;
}
.stat span{ color:var(--text-2); font-size:13.5px; line-height:1.5; }
.stat em{ display:block; margin-top:3px; color:#66748A; font-style:normal; font-size:11.5px; }

/* ---------------------------------------------------------------- 区块 */
.section{ padding:104px 0; position:relative; }
.sec-head{ max-width:640px; margin-bottom:52px; }
.sec-head.center{ margin-inline:auto; text-align:center; }
.kicker{
  font-size:11.5px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--blue); font-weight:600; margin-bottom:14px;
}
.sec-head h2{ font-size:clamp(28px,3.4vw,42px); font-weight:680; }
.sec-sub{ margin-top:16px; color:var(--text-2); font-size:15.5px; line-height:1.8; }
.br-m{ display:none; }

/* ---------------------------------------------------------------- 卡片 */
.cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.card{
  position:relative;
  padding:26px 24px 24px;
  border:1px solid var(--line); border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.028),rgba(255,255,255,.008));
  transition:border-color .22s ease, transform .22s ease, background .22s ease;
}
.card:hover{
  border-color:rgba(59,130,246,.34);
  transform:translateY(-3px);
  background:linear-gradient(180deg,rgba(59,130,246,.07),rgba(255,255,255,.008));
}
.card-icon{
  width:40px; height:40px; border-radius:11px;
  display:grid; place-items:center; margin-bottom:18px;
  color:#9CC2FF; background:var(--blue-soft);
  border:1px solid rgba(59,130,246,.22);
}
.card-icon svg{ width:22px; height:22px; }
.card h3{ font-size:17.5px; font-weight:640; }
.card > p{ margin-top:10px; color:var(--text-2); font-size:14px; line-height:1.75; }
.ticks{ list-style:none; margin:16px 0 0; padding:0; display:grid; gap:7px; }
.ticks li{
  position:relative; padding-left:18px;
  color:#8C9AB0; font-size:12.5px; line-height:1.6;
}
.ticks li::before{
  content:""; position:absolute; left:2px; top:8px;
  width:6px; height:6px; border-radius:2px;
  background:rgba(59,130,246,.55);
}

/* ---------------------------------------------------------------- AI 区块 */
.section-ai{ background:linear-gradient(180deg,transparent,rgba(37,99,235,.055) 30%,rgba(37,99,235,.03) 70%,transparent); }
.ai-layout{ display:grid; grid-template-columns:1.06fr .94fr; gap:56px; align-items:start; }

.tabs{
  display:inline-flex; gap:4px; padding:4px;
  border:1px solid var(--line); border-radius:11px;
  background:rgba(255,255,255,.03); margin-bottom:26px;
}
.tab{
  padding:8px 18px; border:0; border-radius:8px;
  background:transparent; color:var(--text-2);
  font-family:inherit; font-size:13.5px; font-weight:600; cursor:pointer;
  transition:.18s ease;
}
.tab:hover{ color:var(--text); }
.tab.active{ background:var(--blue-strong); color:#fff; box-shadow:0 6px 16px -8px rgba(37,99,235,.9); }

.tab-panel{ display:none; }
.tab-panel.active{ display:block; animation:fadeUp .28s ease both; }
@keyframes fadeUp{ from{ opacity:0; transform:translateY(6px) } to{ opacity:1; transform:none } }
.panel-lede{ color:var(--text-2); font-size:15px; margin-bottom:18px; }

.feat-list{ list-style:none; margin:0; padding:0; display:grid; gap:2px; }
.feat-list li{
  display:flex; gap:16px; padding:16px 0;
  border-top:1px solid var(--line);
}
.feat-list li:last-child{ border-bottom:1px solid var(--line); }
.feat-list .n{
  font-family:var(--mono); font-size:11.5px; color:#5E7BA6;
  padding-top:3px; letter-spacing:.04em;
}
.feat-list b{ display:block; font-size:15px; font-weight:620; color:var(--text); }
.feat-list p{ margin-top:5px; color:var(--text-2); font-size:13.8px; line-height:1.7; }

.mini-grid{ display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:26px; }
.mini{
  padding:15px 16px; border-radius:11px;
  border:1px solid var(--line); background:rgba(255,255,255,.022);
}
.mini b{ display:block; font-size:13px; color:#BFD7FF; margin-bottom:4px; letter-spacing:.02em; }
.mini p{ color:#8A98AE; font-size:12.5px; line-height:1.65; }

/* 对话示意 */
.chat-demo{
  position:sticky; top:96px;
  border:1px solid var(--line-strong); border-radius:var(--radius-lg);
  background:linear-gradient(180deg,#131B28,#0C121C);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.chat-head{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 18px; border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.02);
}
.chat-title{ font-size:13.5px; font-weight:650; }
.chat-mode{
  margin-left:8px; font-size:10.5px; color:#9FB6D8;
  border:1px solid var(--line); border-radius:5px; padding:2px 7px;
}
.chat-online{ display:inline-flex; align-items:center; gap:6px; font-size:10.5px; color:var(--muted); }
.chat-online i{ width:5px; height:5px; border-radius:50%; background:var(--green); }

.chat-body{ padding:20px 18px 10px; display:grid; gap:14px; }
.msg.user{ justify-self:end; max-width:88%; }
.msg.user p{
  background:rgba(59,130,246,.16); border:1px solid rgba(59,130,246,.28);
  color:#DBE9FF; padding:10px 13px; border-radius:12px 12px 4px 12px;
  font-size:13px; line-height:1.65;
}
.msg.bot{ max-width:100%; }
.bot-label{ font-size:10.5px; letter-spacing:.08em; color:var(--muted); margin-bottom:9px; }
.cmd-card{
  display:flex; align-items:center; gap:10px;
  padding:9px 11px; margin-bottom:7px;
  border:1px solid var(--line); border-radius:8px;
  background:rgba(255,255,255,.026);
}
.cmd-card code{
  font-size:11px; color:#C9D8EC;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
.risk{
  margin-left:auto; flex:0 0 auto;
  font-size:9.5px; font-style:normal; letter-spacing:.04em;
  padding:2px 6px; border-radius:4px;
}
.risk.low{ color:var(--green); background:var(--green-soft); border:1px solid rgba(61,220,151,.2); }
.risk.mid{ color:var(--amber); background:rgba(245,165,36,.1); border:1px solid rgba(245,165,36,.22); }
.risk.high{ color:var(--red); background:rgba(242,85,90,.1); border:1px solid rgba(242,85,90,.22); }
.bot-foot{ margin-top:8px; font-size:10.5px; color:#66748A; }

.plan-list{ margin:0 0 12px; padding-left:18px; color:#9FAFC6; font-size:12px; line-height:1.85; }
.step{
  display:flex; align-items:center; gap:9px;
  padding:7px 10px; margin-bottom:6px;
  border-radius:7px; border:1px solid var(--line);
  background:rgba(255,255,255,.022);
}
.step code{ font-size:10.5px; color:#C2D1E5; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.step em{ margin-left:auto; font-style:normal; font-size:9.5px; color:#66809F; white-space:nowrap; }
.step span{ font-size:10px; }
.step.done span{ color:var(--green); }
.step.wait{ border-color:rgba(245,165,36,.28); background:rgba(245,165,36,.055); }
.step.wait span{ color:var(--amber); }
.step.wait em{ color:var(--amber); }

.chat-input{
  display:flex; align-items:center; gap:10px;
  margin:4px 18px 18px; padding:11px 12px;
  border:1px solid var(--line); border-radius:10px;
  background:rgba(255,255,255,.026);
  color:#5F6E85; font-size:11.5px;
}
.chat-input .send{
  margin-left:auto; width:26px; height:26px; border-radius:7px;
  display:grid; place-items:center; color:#CFE0F8;
  background:rgba(59,130,246,.22); border:1px solid rgba(59,130,246,.3);
}
.chat-input .send svg{ width:15px; height:15px; }

/* ---------------------------------------------------------------- 界面还原 */
.section-ui{ border-top:1px solid var(--line); background:radial-gradient(60% 40% at 50% 0%,rgba(59,130,246,.09),transparent 70%); }
.app-mock{
  border:1px solid var(--line-strong); border-radius:14px; overflow:hidden;
  background:#F5F7FA; color:#1F2937;
  box-shadow:0 40px 90px -40px rgba(0,0,0,.95), 0 0 0 1px rgba(255,255,255,.04);
  font-size:12px;
}
.app-title{
  display:flex; align-items:center; gap:14px;
  padding:7px 12px; background:#fff; border-bottom:1px solid #E4E8EE;
}
.app-logo{
  width:16px; height:16px; border-radius:4px;
  background:linear-gradient(145deg,#3B82F6,#1D4ED8);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35);
}
.app-name{ font-size:11.5px; font-weight:650; color:#374151; }
.app-menu{ display:flex; gap:2px; margin-left:8px; }
.app-menu span{ padding:3px 8px; border-radius:4px; color:#4B5563; font-size:11px; }
.app-menu span:first-child{ background:#EEF3FC; color:#1D4ED8; }
.app-win{ margin-left:auto; display:flex; gap:14px; color:#9AA4B2; font-size:12px; }
.app-win i{ width:8px; height:8px; border:1px solid #C7CED8; border-radius:2px; }

.app-tabs{ display:flex; align-items:center; gap:2px; padding:0 10px; background:#FBFCFE; border-bottom:1px solid #E4E8EE; }
.app-tab{
  display:inline-flex; align-items:center; gap:6px;
  padding:7px 12px; font-size:10.5px; color:#6B7280;
  border-bottom:2px solid transparent;
}
.app-tab.active{ color:#1D4ED8; border-bottom-color:#2563EB; background:#fff; }
.app-tab .live{ width:5px; height:5px; border-radius:50%; background:#22B573; }
.app-tab i:not(.live){ width:5px; height:5px; border-radius:50%; background:#C3CBD6; }
.app-tab.add{ color:#9AA4B2; font-size:13px; }

.app-main{ display:grid; grid-template-columns:1fr 300px; min-height:352px; background:#fff; }
.app-term{
  padding:14px 16px; background:#0F1622; color:#C7D3E5;
  font-size:11px; line-height:1.95; overflow:hidden;
}
.app-term p{ white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.app-term .dim{ color:#7C8BA2; }
.app-term .u{ color:#7FB2FF; }
.app-term .p{ color:#6B7C94; }
.app-term .d{ color:#3DDC97; }
.app-term .green{ color:#3DDC97; }
.app-term .typed{ color:#EAF2FF; }
.app-term .hint{ color:#61718A; font-size:10px; }

.app-side{ border-left:1px solid #E4E8EE; background:#FAFBFD; padding:12px; display:flex; flex-direction:column; gap:9px; }
.side-head{ display:flex; align-items:center; justify-content:space-between; font-size:11px; font-weight:650; color:#374151; }
.side-seg{ display:flex; gap:2px; padding:2px; border:1px solid #E1E6ED; border-radius:5px; background:#fff; font-size:9.5px; font-weight:500; }
.side-seg b{ background:#2563EB; color:#fff; padding:1px 7px; border-radius:3px; }
.side-seg i{ padding:1px 7px; color:#6B7280; font-style:normal; }
.side-status{ display:flex; align-items:center; gap:6px; font-size:9.5px; color:#6B7280; }
.side-status i{ width:5px; height:5px; border-radius:50%; background:#22B573; }
.side-bar{ height:4px; border-radius:99px; background:#E6EAF1; overflow:hidden; }
.side-bar span{ display:block; width:39%; height:100%; background:linear-gradient(90deg,#3B82F6,#22B573); }
.side-note{ font-size:9px; color:#8A94A4; }
.side-card{ border:1px solid #E4E8EE; border-radius:7px; background:#fff; padding:9px 10px; }
.side-card-title{ font-size:10px; font-weight:650; color:#374151; margin-bottom:6px; }
.side-text{ font-size:9.5px; color:#6B7280; line-height:1.6; }
.side-cmd{ display:flex; align-items:center; gap:6px; margin-top:5px; }
.side-cmd code{ font-size:8.5px; color:#38455A; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.side-cmd .risk{ font-size:8px; padding:1px 4px; }
.side-card-foot{ margin-top:7px; font-size:8.5px; color:#9AA4B2; }
.side-input{
  margin-top:auto; border:1px solid #E1E6ED; border-radius:6px; background:#fff;
  padding:7px 9px; font-size:9.5px; color:#9AA4B2;
}
.app-status{
  display:flex; align-items:center; gap:18px; flex-wrap:wrap;
  padding:5px 12px; background:#fff; border-top:1px solid #E4E8EE;
  font-size:9.5px; color:#6B7280;
}
.app-status .st-ok{ color:#1D9E6A; }
.app-status .st-ctx{ margin-left:auto; color:#2563EB; }
.app-status .st-off{ color:#8A94A4; }

.ui-points{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin-top:36px; }
.ui-points b{ font-size:14px; }
.ui-points p{ margin-top:6px; color:var(--text-2); font-size:13px; line-height:1.7; }
.ui-points > div{ padding-left:16px; border-left:2px solid rgba(59,130,246,.35); }

/* ---------------------------------------------------------------- 安全 */
.section-security{ border-top:1px solid var(--line); background:var(--bg-soft); }
.sec-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; }
.sec-item{ background:var(--bg-soft); padding:26px 24px; transition:background .2s ease; }
.sec-item:hover{ background:#111927; }
.sec-ico{ color:#8FB8FF; margin-bottom:14px; }
.sec-ico svg{ width:24px; height:24px; }
.sec-item b{ display:block; font-size:15px; font-weight:620; }
.sec-item p{ margin-top:7px; color:var(--text-2); font-size:13.2px; line-height:1.72; }

.privacy-note{
  display:flex; gap:14px; align-items:flex-start;
  margin-top:24px; padding:18px 20px;
  border:1px solid rgba(61,220,151,.2); border-radius:12px;
  background:rgba(61,220,151,.055);
}
.privacy-note svg{ width:22px; height:22px; flex:0 0 22px; color:var(--green); margin-top:2px; }
.privacy-note p{ color:#B7C6DA; font-size:13.5px; line-height:1.75; }
.privacy-note b{ color:#DDE9F7; }

/* ---------------------------------------------------------------- 下载 */
.section-download{ padding-top:96px; }
.dl-card{
  display:grid; grid-template-columns:1.25fr .75fr; gap:0;
  border:1px solid rgba(59,130,246,.28); border-radius:var(--radius-lg);
  background:
    radial-gradient(70% 120% at 0% 0%,rgba(37,99,235,.20),transparent 62%),
    linear-gradient(180deg,#111A29,#0B111B);
  overflow:hidden;
  box-shadow:0 30px 80px -40px rgba(37,99,235,.6);
}
.dl-left{ padding:44px 44px 40px; }
.dl-left h2{ font-size:clamp(30px,3.6vw,44px); letter-spacing:-.03em; }
.dl-desc{ margin-top:12px; color:var(--text-2); font-size:15px; max-width:34em; }
.dl-desc code{ color:#CFE0F8; background:rgba(255,255,255,.06); padding:2px 6px; border-radius:4px; font-size:12.5px; }
.dl-cta{ display:flex; flex-wrap:wrap; gap:12px; margin-top:28px; }
.dl-fine{ margin-top:18px; color:#6D7C93; font-size:12px; }

.dl-right{
  padding:34px 32px; border-left:1px solid var(--line);
  background:rgba(0,0,0,.22);
  display:flex; flex-direction:column; justify-content:center; gap:14px;
}
.spec{ margin:0; display:grid; gap:0; }
.spec > div{ display:flex; align-items:baseline; gap:12px; padding:7px 0; border-bottom:1px dashed rgba(148,163,184,.13); }
.spec > div:last-child{ border-bottom:none; }
.spec dt{ flex:0 0 64px; color:var(--muted); font-size:12px; }
.spec dd{ margin:0; font-size:12.5px; color:#D3DFEF; }
.spec-note{ color:#68768C; font-size:11.5px; line-height:1.65; }

/* ---------------------------------------------------------------- FAQ */
.faq{ display:grid; gap:0; border-top:1px solid var(--line); }
.faq-item{ border-bottom:1px solid var(--line); }
.faq-q{
  width:100%; display:flex; align-items:center; gap:18px;
  padding:20px 4px; background:none; border:0; cursor:pointer;
  color:var(--text); font-family:inherit; font-size:15.5px; font-weight:560;
  text-align:left;
}
.faq-q:hover{ color:#BFD7FF; }
.faq-q i{
  margin-left:auto; flex:0 0 16px; width:16px; height:16px; position:relative;
}
.faq-q i::before,.faq-q i::after{
  content:""; position:absolute; background:#7C8AA0; border-radius:2px;
  transition:transform .22s ease, background .22s ease;
}
.faq-q i::before{ left:0; top:7.25px; width:16px; height:1.5px; }
.faq-q i::after{ left:7.25px; top:0; width:1.5px; height:16px; }
.faq-q[aria-expanded="true"] i::after{ transform:rotate(90deg); }
.faq-q[aria-expanded="true"] i::before{ background:var(--blue); }
.faq-a{
  max-height:0; overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a p{
  padding:0 34px 20px 4px;
  color:var(--text-2); font-size:14px; line-height:1.85;
}

/* ---------------------------------------------------------------- 收尾 */
.final{ padding:96px 0; border-top:1px solid var(--line); background:radial-gradient(50% 80% at 50% 100%,rgba(37,99,235,.16),transparent 70%); text-align:center; }
.final-inner{ display:flex; flex-direction:column; align-items:center; gap:14px; }
.final h2{ font-size:clamp(26px,3.2vw,38px); max-width:22em; }
.final p{ color:var(--text-2); font-size:14.5px; }
.final .btn{ margin-top:10px; }

.footer{ border-top:1px solid var(--line); background:#080C13; padding:52px 0 26px; }
.footer-inner{ display:flex; justify-content:space-between; gap:40px; flex-wrap:wrap; }
.foot-brand p{ margin-top:12px; color:var(--muted); font-size:13px; }
.foot-links{ display:flex; gap:64px; }
.foot-links > div{ display:flex; flex-direction:column; gap:9px; }
.foot-links b{ font-size:11.5px; letter-spacing:.12em; color:#66748A; font-weight:600; text-transform:uppercase; margin-bottom:2px; }
.foot-links a{ color:var(--text-2); font-size:13.5px; transition:color .18s ease; }
.foot-links a:hover{ color:#CFE0F8; }
.foot-bottom{
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  margin-top:42px; padding-top:20px; border-top:1px solid var(--line);
  color:#5D6B80; font-size:12px;
}

/* ---------------------------------------------------------------- Toast */
.toast{
  position:fixed; left:50%; bottom:28px; z-index:999;
  transform:translate(-50%,140%);
  display:flex; align-items:center; gap:10px;
  padding:12px 18px 12px 14px;
  border:1px solid rgba(59,130,246,.35); border-radius:10px;
  background:rgba(17,26,41,.97); color:#DCE8FF;
  font-size:13px; box-shadow:0 20px 44px -18px rgba(0,0,0,.9);
  transition:transform .3s cubic-bezier(.22,1,.36,1), opacity .3s ease;
  opacity:0; pointer-events:none; max-width:min(92vw,520px);
}
.toast.show{ transform:translate(-50%,0); opacity:1; }
.toast-ico{ color:var(--blue); display:grid; place-items:center; }
.toast-ico svg{ width:17px; height:17px; }

/* ---------------------------------------------------------------- 进入动画 */
/* 用 translate 而非 transform，避免影响卡片 hover 的位移 */
.reveal{ opacity:0; translate:0 16px; transition:opacity .6s ease, translate .6s cubic-bezier(.22,1,.36,1); }
.reveal.in{ opacity:1; translate:0 0; }

/* ---------------------------------------------------------------- 响应式 */
@media (max-width:1080px){
  .hero-inner{ grid-template-columns:1fr; gap:64px; }
  .hero-copy{ max-width:660px; }
  .hero-visual{ max-width:640px; }
  .ai-float{ right:0; }
  .visual-caption{ margin-top:54px; }
  .ai-layout{ grid-template-columns:1fr; gap:44px; }
  .chat-demo{ position:static; max-width:620px; }
  .cards{ grid-template-columns:1fr 1fr; }
  .app-main{ grid-template-columns:1fr 268px; }
}

@media (max-width:860px){
  .nav-links{
    position:fixed; top:68px; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:2px;
    padding:12px 20px 20px;
    background:rgba(9,13,20,.98);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(14px);
    max-height:0; overflow:hidden; padding-block:0 0;
    opacity:0; pointer-events:none;
    transition:max-height .28s ease, opacity .2s ease, padding .28s ease;
  }
  .nav-links.open{ max-height:400px; opacity:1; pointer-events:auto; padding:12px 20px 20px; }
  .nav-links a{ padding:11px 10px; font-size:15px; }
  .nav-toggle{ display:grid; }
  .nav-inner{ gap:12px; }
  .stats-grid{ grid-template-columns:1fr 1fr; }
  .stat{ border-left:none; border-top:1px solid var(--line); padding:22px 20px; }
  .stat:nth-child(1),.stat:nth-child(2){ border-top:none; }
  .stat:nth-child(odd){ padding-left:0; }
  .stat b{ font-size:32px; }
  .cards{ grid-template-columns:1fr; }
  .sec-grid{ grid-template-columns:1fr 1fr; }
  .ui-points{ grid-template-columns:1fr; gap:18px; }
  .app-main{ grid-template-columns:1fr; }
  .app-side{ display:none; }
  .app-menu span:nth-child(n+5){ display:none; }
  .dl-card{ grid-template-columns:1fr; }
  .dl-right{ border-left:none; border-top:1px solid var(--line); }
  .dl-left{ padding:34px 26px 30px; }
  .dl-right{ padding:26px; }
  .br-m{ display:inline; }
  .section{ padding:80px 0; }
  .footer-inner{ flex-direction:column; gap:32px; }
  .foot-links{ gap:48px; }
}

@media (max-width:640px){
  body{ font-size:15px; }
  .wrap{ padding:0 20px; }
  .hero{ padding:116px 0 60px; }
  .hero h1{ font-size:38px; }
  .lede{ font-size:15.5px; }
  .hero-cta .btn{ width:100%; }
  .hero-meta{ gap:6px 16px; font-size:12px; }
  .term-body{ font-size:11px; padding:14px; }
  .term-tabs .term-tab:nth-child(2){ display:none; }
  .term-badge{ display:none; }
  .ai-float{ position:static; width:100%; margin-top:-14px; }
  .visual-caption{ margin-top:12px; text-align:left; }
  .term-window{ border-radius:14px; }
  .stats-grid{ grid-template-columns:1fr; }
  .stat{ border-top:1px solid var(--line); padding:18px 0; }
  .stat:nth-child(1){ border-top:none; }
  .stat:nth-child(2){ border-top:1px solid var(--line); }
  .sec-grid{ grid-template-columns:1fr; }
  .mini-grid{ grid-template-columns:1fr; }
  .sec-head{ margin-bottom:36px; }
  .section{ padding:64px 0; }
  .app-mock{ font-size:10px; }
  .app-term{ font-size:9.5px; padding:11px; }
  .app-menu{ display:none; }
  .app-status{ gap:10px; font-size:8.5px; }
  .app-status .st-ctx{ margin-left:0; }
  .spec dt{ flex-basis:58px; }
  .dl-cta .btn{ width:100%; }
  .foot-links{ gap:36px; flex-wrap:wrap; }
  .faq-q{ font-size:14.5px; padding:17px 2px; }
  .faq-a p{ padding-right:8px; font-size:13.5px; }
  .final{ padding:72px 0; }
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
  .reveal{ opacity:1; translate:0 0; }
}