/* ==========================================================================
   HelloWorld 翻译官网 — 全站设计系统
   风格：深色科技风 + 霓虹渐变
   作者：HelloWorld Front-End
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --bg:#05070f;
  --bg-soft:#080c18;
  --bg-raise:#0c1122;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(255,255,255,.075);
  --border:rgba(255,255,255,.10);
  --border-strong:rgba(255,255,255,.18);

  --text:#eaf0ff;
  --text-dim:#b7c2dd;
  --muted:#8592b3;

  --brand:#4f7cff;
  --brand-2:#8b5cf6;
  --brand-3:#22d3ee;
  --ok:#34d399;
  --warn:#fbbf24;

  --grad:linear-gradient(135deg,#4f7cff 0%,#8b5cf6 52%,#22d3ee 100%);
  --grad-soft:linear-gradient(135deg,rgba(79,124,255,.18),rgba(139,92,246,.14));
  --grad-text:linear-gradient(100deg,#8fb0ff 0%,#c4a6ff 45%,#6ee7f5 100%);

  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-xl:30px;

  --shadow:0 18px 50px rgba(3,6,18,.55);
  --glow:0 0 0 1px rgba(79,124,255,.35),0 18px 60px rgba(79,124,255,.28);
  --ring:0 0 0 3px rgba(79,124,255,.30);

  --container:1200px;
  --header-h:74px;
  --ease:cubic-bezier(.22,.72,.28,1);

  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-en:"Inter","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

/* ---------- 2. 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
/* 页面顶部氛围光 + 网格底纹 */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1100px 620px at 12% -8%,rgba(79,124,255,.20),transparent 60%),
    radial-gradient(1000px 560px at 88% 4%,rgba(139,92,246,.17),transparent 62%),
    radial-gradient(900px 700px at 50% 108%,rgba(34,211,238,.10),transparent 60%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.32;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 72%);
}
img,svg,video{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease)}
a:hover{color:#fff}
h1,h2,h3,h4,h5{margin:0 0 .6em;line-height:1.22;font-weight:800;letter-spacing:-.015em;color:#fff}
h1{font-size:clamp(2.1rem,4.6vw,3.6rem)}
h2{font-size:clamp(1.6rem,3.1vw,2.5rem)}
h3{font-size:clamp(1.12rem,1.7vw,1.4rem)}
h4{font-size:1.06rem;font-weight:700}
p{margin:0 0 1.05em;color:var(--text-dim)}
ul,ol{margin:0 0 1.05em;padding-left:1.25em;color:var(--text-dim)}
li{margin-bottom:.4em}
strong{color:#fff;font-weight:700}
button{font-family:inherit}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:8px}
::selection{background:rgba(79,124,255,.4);color:#fff}

/* 无障碍：跳转正文 */
.skip-link{
  position:absolute;left:14px;top:-70px;z-index:200;padding:10px 18px;border-radius:10px;
  background:var(--brand);color:#fff;font-weight:700;transition:top .2s;
}
.skip-link:focus{top:14px}

/* 自定义滚动条 */
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-track{background:#05070f}
::-webkit-scrollbar-thumb{background:linear-gradient(#33406b,#1d2440);border-radius:8px;border:3px solid #05070f}
::-webkit-scrollbar-thumb:hover{background:linear-gradient(#4f7cff,#8b5cf6)}

/* ---------- 3. 布局工具 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px}
.container-narrow{max-width:900px}
.section{padding:clamp(64px,8vw,120px) 0;position:relative}
.section-sm{padding:clamp(44px,5vw,72px) 0}
.section-alt{background:linear-gradient(180deg,transparent,rgba(12,17,34,.72) 22%,rgba(12,17,34,.72) 78%,transparent)}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--border-strong),transparent)}

.grid{display:grid;gap:22px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,60px);align-items:center}
.center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}

/* 区块标题 */
.section-head{max-width:760px;margin:0 auto clamp(34px,4vw,54px);text-align:center}
.section-head.left{margin-left:0;text-align:left}
.kicker{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;
  padding:7px 15px;border-radius:999px;border:1px solid rgba(79,124,255,.35);
  background:rgba(79,124,255,.12);color:#a8c0ff;
  font-size:.78rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
}
.kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-3);box-shadow:0 0 12px var(--brand-3)}
.section-head p{font-size:1.06rem;margin-bottom:0}
.grad-text{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}

/* ---------- 4. 按钮 ---------- */
.btn{
  --btn-bg:var(--surface-2);
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:999px;border:1px solid var(--border-strong);
  background:var(--btn-bg);color:#fff;font-size:.97rem;font-weight:700;line-height:1;
  cursor:pointer;transition:transform .28s var(--ease),box-shadow .28s var(--ease),background .28s var(--ease),border-color .28s var(--ease);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(4,8,22,.6);color:#fff}
.btn:active{transform:translateY(0)}
.btn-primary{
  background:var(--grad);border-color:transparent;color:#fff;
  box-shadow:0 12px 34px rgba(79,124,255,.36);
}
.btn-primary:hover{box-shadow:0 18px 46px rgba(139,92,246,.48)}
.btn-ghost{background:transparent;border-color:var(--border-strong);color:var(--text)}
.btn-ghost:hover{background:var(--surface);border-color:rgba(79,124,255,.6)}
.btn-light{background:#fff;color:#0a1024;border-color:transparent}
.btn-lg{padding:16px 34px;font-size:1.05rem}
.btn-sm{padding:9px 18px;font-size:.86rem}
.btn-block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}
.btn-row.center{justify-content:center}
.btn svg{width:18px;height:18px;flex:none}

/* ---------- 5. 顶部公告条 ---------- */
.topbar{
  position:relative;z-index:60;
  background:linear-gradient(90deg,rgba(79,124,255,.22),rgba(139,92,246,.22),rgba(34,211,238,.18));
  border-bottom:1px solid var(--border);
  font-size:.83rem;color:#dbe4ff;text-align:center;padding:8px 22px;
}
.topbar a{color:#fff;font-weight:700;border-bottom:1px solid rgba(255,255,255,.45)}
.topbar .tag{
  display:inline-block;margin-right:8px;padding:1px 8px;border-radius:6px;
  background:#fff;color:#1b2450;font-size:.7rem;font-weight:800;letter-spacing:.04em;vertical-align:1px;
}

/* ---------- 6. 页头 / 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(5,7,15,.72);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border-bottom:1px solid transparent;
  transition:border-color .3s,background .3s,box-shadow .3s;
}
.site-header.is-stuck{border-bottom-color:var(--border);background:rgba(5,7,15,.9);box-shadow:0 10px 34px rgba(2,4,12,.6)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:22px;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand img{width:auto;height:38px}
.brand-text{font-size:1.22rem;font-weight:800;letter-spacing:-.02em;color:#fff;line-height:1.1}
.brand-text small{display:block;font-size:.68rem;font-weight:600;letter-spacing:.22em;color:var(--muted);text-transform:uppercase}

.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links li{margin:0}
.nav-links a{
  position:relative;display:block;padding:10px 15px;border-radius:10px;
  font-size:.96rem;font-weight:600;color:var(--text-dim);transition:color .25s,background .25s;
}
.nav-links a::after{
  content:"";position:absolute;left:15px;right:15px;bottom:5px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav-links a:hover{color:#fff;background:var(--surface)}
.nav-links a:hover::after,.nav-links a[aria-current="page"]::after{transform:scaleX(1)}
.nav-links a[aria-current="page"]{color:#fff}

.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border-strong);
  background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:19px;height:2px;border-radius:2px;background:#fff;position:relative;transition:.3s}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:19px;height:2px;border-radius:2px;background:#fff;transition:.3s}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* ---------- 7. 面包屑 ---------- */
.breadcrumbs{padding:20px 0 0;font-size:.86rem;color:var(--muted)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.breadcrumbs li{margin:0;display:flex;align-items:center;gap:8px}
.breadcrumbs li+li::before{content:"/";color:rgba(255,255,255,.25)}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:#fff}
.breadcrumbs [aria-current]{color:var(--text-dim)}

/* ---------- 8. 页面首屏（内页通用） ---------- */
.page-hero{padding:clamp(40px,5vw,74px) 0 clamp(30px,4vw,48px);position:relative;overflow:hidden}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{max-width:16em}
.page-hero .lead{font-size:1.12rem;max-width:62ch;color:var(--text-dim)}

/* ---------- 9. 首页 Hero ---------- */
.hero{position:relative;padding:clamp(46px,7vw,96px) 0 clamp(50px,6vw,96px);overflow:hidden}
.orb{position:absolute;border-radius:50%;filter:blur(96px);pointer-events:none;z-index:0}
.orb-a{width:560px;height:560px;background:rgba(79,124,255,.34);top:-190px;left:-120px}
.orb-b{width:520px;height:520px;background:rgba(139,92,246,.30);top:-120px;right:-150px}
.orb-c{width:460px;height:460px;background:rgba(34,211,238,.20);bottom:-240px;left:38%}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(30px,4vw,64px);align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:22px;padding:8px 16px;
  border-radius:999px;border:1px solid rgba(34,211,238,.4);background:rgba(34,211,238,.10);
  font-size:.83rem;font-weight:700;color:#9fe9f7;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.82)}}
.hero h1{margin-bottom:20px}
.hero .lead{font-size:1.16rem;max-width:56ch;margin-bottom:30px}
.hero-note{margin-top:16px;font-size:.86rem;color:var(--muted)}
.hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px;padding-top:30px;border-top:1px solid var(--border)}
.hero-metrics .num{font-size:1.75rem;font-weight:800;line-height:1.1;
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-metrics .lbl{font-size:.85rem;color:var(--muted);margin-top:4px}

/* 产品界面模拟窗口 */
.hero-visual{position:relative}
.app-window{
  position:relative;border-radius:var(--r-lg);border:1px solid var(--border-strong);
  background:linear-gradient(180deg,rgba(16,22,44,.96),rgba(8,12,26,.96));
  box-shadow:var(--shadow),0 0 90px rgba(79,124,255,.22);overflow:hidden;
}
.app-bar{display:flex;align-items:center;gap:9px;padding:13px 16px;border-bottom:1px solid var(--border);background:rgba(255,255,255,.03)}
.app-dots{display:flex;gap:7px}
.app-dots i{width:11px;height:11px;border-radius:50%;display:block}
.app-dots i:nth-child(1){background:#ff5f57}
.app-dots i:nth-child(2){background:#febc2e}
.app-dots i:nth-child(3){background:#28c840}
.app-title{margin-left:10px;font-size:.8rem;color:var(--muted);letter-spacing:.03em}
.app-body{display:grid;grid-template-columns:1fr 1fr;gap:0;min-height:296px}
.app-col{padding:20px;position:relative}
.app-col+.app-col{border-left:1px solid var(--border)}
.app-col-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.lang-chip{
  display:inline-flex;align-items:center;gap:7px;padding:5px 12px;border-radius:999px;
  border:1px solid var(--border-strong);background:var(--surface);font-size:.74rem;font-weight:700;color:var(--text-dim);
}
.lang-chip .flag{width:15px;height:11px;border-radius:2px;background:var(--grad);display:block}
.app-text{font-size:.9rem;line-height:1.85;color:var(--text-dim);margin:0}
.app-text .hl{background:linear-gradient(90deg,rgba(79,124,255,.35),rgba(139,92,246,.28));color:#fff;border-radius:4px;padding:1px 4px}
.app-out{font-size:.9rem;line-height:1.85;color:#dfe7ff;margin:0}
.app-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 16px;border-top:1px solid var(--border);background:rgba(255,255,255,.03);font-size:.76rem;color:var(--muted)
}
.app-foot .tagline{display:inline-flex;align-items:center;gap:6px}
.app-foot .tagline b{color:#9fe9f7;font-weight:700}
/* 悬浮小卡片 */
.float-card{
  position:absolute;z-index:3;display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:14px;border:1px solid var(--border-strong);
  background:rgba(11,16,32,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 16px 40px rgba(2,4,12,.6);font-size:.8rem;font-weight:700;color:#fff;
  animation:floaty 6s ease-in-out infinite;
}
.float-card small{display:block;font-size:.7rem;font-weight:600;color:var(--muted)}
.float-card .fc-ico{width:34px;height:34px;border-radius:10px;background:var(--grad);display:grid;place-items:center;flex:none}
.float-card .fc-ico svg{width:18px;height:18px}
.float-l{left:-26px;bottom:56px}
.float-r{right:-22px;top:-24px;animation-delay:-3s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ---------- 10. Logo 墙 ---------- */
.logo-strip{padding:34px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:rgba(8,12,24,.6)}
.logo-strip .cap{text-align:center;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:22px}
.logo-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:clamp(24px,4vw,58px)}
.logo-row span{
  font-family:var(--font-en);font-size:1.16rem;font-weight:800;letter-spacing:.02em;
  color:rgba(255,255,255,.42);filter:grayscale(1);transition:.3s
}
.logo-row span:hover{color:#fff;filter:none;transform:translateY(-2px)}

/* ---------- 11. 卡片通用 ---------- */
.card{
  position:relative;padding:28px;border-radius:var(--r-lg);
  border:1px solid var(--border);background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));
  transition:transform .35s var(--ease),border-color .35s,box-shadow .35s;overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;opacity:0;pointer-events:none;
  background:radial-gradient(420px 220px at 50% 0%,rgba(79,124,255,.20),transparent 70%);
  transition:opacity .35s;
}
.card:hover{transform:translateY(-6px);border-color:rgba(79,124,255,.5);box-shadow:0 22px 54px rgba(3,6,18,.6)}
.card:hover::before{opacity:1}
.card > *{position:relative;z-index:1}
.card h3{margin-bottom:10px}
.card p{margin-bottom:0;font-size:.95rem}
.card-ico{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--grad-soft);border:1px solid rgba(79,124,255,.34);color:#a9c1ff;
}
.card-ico svg{width:24px;height:24px}
.card-link{display:inline-flex;align-items:center;gap:7px;margin-top:16px;font-size:.9rem;font-weight:700;color:#9fb8ff}
.card-link svg{width:15px;height:15px;transition:transform .3s}
.card-link:hover svg{transform:translateX(4px)}

/* ---------- 12. 图文卡片（场景） ---------- */
.media-card{
  position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);
  background:rgba(10,14,28,.86);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
}
.media-card:hover{transform:translateY(-6px);border-color:rgba(79,124,255,.5);box-shadow:0 24px 60px rgba(3,6,18,.65)}
.media-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.media-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.media-card:hover .thumb img{transform:scale(1.07)}
.media-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,15,0) 40%,rgba(5,7,15,.82) 100%)}
.media-card .body{padding:22px 24px 26px}
.media-card h3{margin-bottom:8px;font-size:1.14rem}
.media-card p{font-size:.93rem;margin-bottom:0}
.media-card .pill{
  position:absolute;top:14px;left:14px;z-index:2;padding:5px 12px;border-radius:999px;
  background:rgba(5,7,15,.72);border:1px solid var(--border-strong);backdrop-filter:blur(8px);
  font-size:.72rem;font-weight:700;color:#cfe0ff;letter-spacing:.04em;
}
.media-card.wide{display:grid;grid-template-columns:.95fr 1.05fr}
.media-card.wide .thumb{aspect-ratio:auto;height:100%;min-height:250px}
.media-card.wide .body{align-self:center}

/* ---------- 13. 功能特性（图文并排） ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(26px,4vw,58px);align-items:center}
.feature-row.rev .feature-visual{order:2}
.feature-visual{position:relative}
.feature-visual img{border-radius:var(--r-lg);border:1px solid var(--border-strong);box-shadow:var(--shadow)}
.feature-list{list-style:none;padding:0;margin:0 0 26px}
.feature-list li{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px;color:var(--text-dim);font-size:.97rem}
.feature-list .tick{
  flex:none;width:22px;height:22px;border-radius:7px;margin-top:3px;display:grid;place-items:center;
  background:var(--grad);box-shadow:0 4px 14px rgba(79,124,255,.4);
}
.feature-list .tick svg{width:13px;height:13px;color:#fff}

/* ---------- 14. 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:st}
.step{position:relative;padding:30px 26px 28px;border-radius:var(--r-lg);border:1px solid var(--border);background:rgba(255,255,255,.035)}
.step::after{
  content:"";position:absolute;top:44px;right:-14px;width:28px;height:1px;
  background:linear-gradient(90deg,rgba(79,124,255,.7),transparent)
}
.step:last-child::after{display:none}
.step-num{
  display:grid;place-items:center;width:44px;height:44px;border-radius:14px;margin-bottom:16px;
  background:var(--grad);color:#fff;font-weight:800;font-size:1.05rem;box-shadow:0 10px 26px rgba(79,124,255,.4)
}
.step h3{font-size:1.08rem;margin-bottom:8px}
.step p{margin-bottom:0;font-size:.93rem}

/* ---------- 15. 数据统计 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{
  text-align:center;padding:30px 20px;border-radius:var(--r-lg);
  border:1px solid var(--border);background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.015));
}
.stat .num{font-size:clamp(1.9rem,3.4vw,2.7rem);font-weight:800;line-height:1.05;
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat .lbl{margin-top:8px;font-size:.9rem;color:var(--text-dim)}
.stat .sub{font-size:.76rem;color:var(--muted);margin-top:3px}

/* ---------- 16. 用户评价 ---------- */
.testimonials{position:relative}
.t-slider{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(320px,1fr);gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 20px;scrollbar-width:none}
.t-slider::-webkit-scrollbar{display:none}
.tcard{
  scroll-snap-align:start;padding:28px;border-radius:var(--r-lg);border:1px solid var(--border);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02))
}
.stars{display:flex;gap:3px;margin-bottom:14px}
.stars svg{width:16px;height:16px;color:#fbbf24}
.tcard p{font-size:.98rem;color:var(--text-dim);margin-bottom:20px}
.tperson{display:flex;align-items:center;gap:12px}
.tavatar{
  width:44px;height:44px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:var(--grad);color:#fff;font-weight:800;font-size:.95rem
}
.tperson .name{font-weight:700;color:#fff;font-size:.95rem}
.tperson .role{font-size:.8rem;color:var(--muted)}
.t-nav{display:flex;gap:10px;justify-content:center;margin-top:6px}
.t-nav button{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--border-strong);background:var(--surface);
  color:#fff;cursor:pointer;display:grid;place-items:center;transition:.25s
}
.t-nav button:hover{background:var(--grad);border-color:transparent}
.t-nav svg{width:16px;height:16px}

/* ---------- 17. 定价 ---------- */
.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{
  position:relative;display:flex;flex-direction:column;padding:32px 28px;border-radius:var(--r-xl);
  border:1px solid var(--border);background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02))
}
.price-card.featured{border-color:rgba(79,124,255,.65);box-shadow:var(--glow);transform:scale(1.03)}
.price-card.featured::after{
  content:"最受欢迎";position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  padding:5px 16px;border-radius:999px;background:var(--grad);font-size:.72rem;font-weight:800;color:#fff;letter-spacing:.06em;white-space:nowrap
}
.price-name{font-size:1.05rem;font-weight:800;color:#fff;margin-bottom:6px}
.price-desc{font-size:.86rem;color:var(--muted);margin-bottom:20px}
.price-amount{display:flex;align-items:flex-end;gap:6px;margin-bottom:22px}
.price-amount .cur{font-size:1.1rem;font-weight:700;color:var(--text-dim);align-self:flex-start;margin-top:6px}
.price-amount .val{font-size:2.6rem;font-weight:800;line-height:1;color:#fff}
.price-amount .per{font-size:.86rem;color:var(--muted);margin-bottom:6px}
.price-list{list-style:none;padding:0;margin:0 0 26px;flex:1}
.price-list li{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;color:var(--text-dim);margin-bottom:11px}
.price-list .tick{flex:none;width:20px;height:20px;border-radius:6px;margin-top:3px;display:grid;place-items:center;background:var(--grad-soft);border:1px solid rgba(79,124,255,.35)}
.price-list .tick svg{width:12px;height:12px;color:#8fb0ff}

/* ---------- 18. FAQ 手风琴 ---------- */
.faq-toolbar{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;margin-bottom:30px}
.search-box{position:relative;flex:1;min-width:260px;max-width:420px}
.search-box svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:17px;height:17px;color:var(--muted)}
.search-box input{
  width:100%;padding:13px 16px 13px 44px;border-radius:999px;border:1px solid var(--border-strong);
  background:rgba(255,255,255,.05);color:#fff;font-size:.94rem;font-family:inherit;
}
.search-box input::placeholder{color:var(--muted)}
.search-box input:focus{border-color:rgba(79,124,255,.7);box-shadow:var(--ring)}
.tabs{display:flex;flex-wrap:wrap;gap:10px}
.tab{
  padding:9px 18px;border-radius:999px;border:1px solid var(--border-strong);background:transparent;
  color:var(--text-dim);font-size:.88rem;font-weight:700;cursor:pointer;transition:.25s
}
.tab:hover{color:#fff;border-color:rgba(79,124,255,.6)}
.tab.is-active{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 8px 24px rgba(79,124,255,.35)}

.faq-list{display:grid;gap:14px}
.faq-item{
  border-radius:var(--r-md);border:1px solid var(--border);overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.018));
  transition:border-color .3s,box-shadow .3s
}
.faq-item[open]{border-color:rgba(79,124,255,.5);box-shadow:0 14px 40px rgba(3,6,18,.5)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:20px 24px;font-weight:700;font-size:1.02rem;color:#fff;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#cfe0ff}
.faq-ico{
  flex:none;width:26px;height:26px;border-radius:8px;border:1px solid var(--border-strong);
  display:grid;place-items:center;position:relative;margin-top:2px;transition:.3s
}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:#9fb8ff;border-radius:2px;transition:.3s}
.faq-ico::before{width:11px;height:2px}
.faq-ico::after{width:2px;height:11px}
.faq-item[open] .faq-ico{background:var(--grad);border-color:transparent}
.faq-item[open] .faq-ico::before,.faq-item[open] .faq-ico::after{background:#fff}
.faq-item[open] .faq-ico::after{transform:scaleY(0)}
.faq-body{padding:0 24px 22px;font-size:.96rem;color:var(--text-dim)}
.faq-body p:last-child{margin-bottom:0}
.faq-body ul{margin-bottom:0}
.faq-empty{padding:40px;text-align:center;color:var(--muted);border:1px dashed var(--border-strong);border-radius:var(--r-lg)}
.faq-cta{
  margin-top:40px;padding:30px;border-radius:var(--r-lg);text-align:center;
  border:1px solid rgba(79,124,255,.35);background:var(--grad-soft)
}

/* ---------- 19. 时间线（关于我们） ---------- */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--brand),var(--brand-2),transparent)}
.tl-item{position:relative;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-33px;top:6px;width:20px;height:20px;border-radius:50%;
  background:var(--bg);border:2px solid var(--brand);box-shadow:0 0 0 5px rgba(79,124,255,.14)
}
.tl-year{font-family:var(--font-en);font-weight:800;font-size:.86rem;letter-spacing:.1em;color:#8fb0ff;margin-bottom:6px}
.tl-item h3{font-size:1.08rem;margin-bottom:6px}
.tl-item p{font-size:.94rem;margin-bottom:0}

/* ---------- 20. 价值观 / 团队 ---------- */
.value-card{text-align:center;padding:32px 24px}
.value-card .card-ico{margin:0 auto 18px}
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.member{text-align:center;padding:26px 18px;border-radius:var(--r-lg);border:1px solid var(--border);background:rgba(255,255,255,.035);transition:.35s var(--ease)}
.member:hover{transform:translateY(-6px);border-color:rgba(79,124,255,.5)}
.member .face{
  width:84px;height:84px;border-radius:50%;margin:0 auto 16px;display:grid;place-items:center;
  background:var(--grad);color:#fff;font-size:1.5rem;font-weight:800;box-shadow:0 12px 30px rgba(79,124,255,.35)
}
.member .name{font-weight:800;color:#fff;font-size:1rem}
.member .role{font-size:.82rem;color:#8fb0ff;margin-top:2px;font-weight:700}
.member .bio{font-size:.84rem;color:var(--muted);margin-top:10px;margin-bottom:0}

/* 办公室图片网格 */
.office-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:190px;gap:16px}
.office-grid img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-md);border:1px solid var(--border);transition:transform .6s var(--ease)}
.office-grid a{overflow:hidden;border-radius:var(--r-md);display:block}
.office-grid a:hover img{transform:scale(1.06)}
.office-grid .tall{grid-row:span 2}

/* ---------- 21. 联系我们 ---------- */
.contact-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.contact-card{padding:26px 22px;text-align:center}
.contact-card .card-ico{margin:0 auto 16px}
.contact-card h3{font-size:1rem;margin-bottom:6px}
.contact-card .val{font-weight:800;color:#fff;font-size:.98rem;word-break:break-all}
.contact-card .sub{font-size:.8rem;color:var(--muted);margin-top:6px;margin-bottom:0}

.form-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(26px,4vw,52px);align-items:start}
.form-panel{padding:clamp(26px,3vw,38px);border-radius:var(--r-xl);border:1px solid var(--border-strong);background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field.full{grid-column:1/-1}
.field label{font-size:.87rem;font-weight:700;color:var(--text-dim)}
.field label .req{color:#ff8095}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border-radius:12px;border:1px solid var(--border-strong);
  background:rgba(255,255,255,.05);color:#fff;font-size:.94rem;font-family:inherit;transition:.25s
}
.field textarea{resize:vertical;min-height:130px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#6f7c9c}
.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(79,124,255,.75);box-shadow:var(--ring);background:rgba(255,255,255,.075)}
.field select option{background:#0c1122;color:#fff}
.field .err{font-size:.78rem;color:#ff8095;display:none}
.field.has-err input,.field.has-err textarea,.field.has-err select{border-color:#ff8095}
.field.has-err .err{display:block}
.checkbox{display:flex;gap:10px;align-items:flex-start;font-size:.85rem;color:var(--text-dim)}
.checkbox input{width:18px;height:18px;flex:none;margin-top:3px;accent-color:#4f7cff}
.form-note{font-size:.79rem;color:var(--muted);margin:14px 0 0}
.form-ok{
  display:none;margin-bottom:20px;padding:14px 18px;border-radius:12px;
  border:1px solid rgba(52,211,153,.5);background:rgba(52,211,153,.12);color:#a7f3d0;font-size:.92rem;font-weight:600
}
.form-ok.show{display:block}

.contact-aside .row{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--border)}
.contact-aside .row:last-child{border-bottom:0}
.contact-aside .ico{
  flex:none;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:var(--grad-soft);border:1px solid rgba(79,124,255,.34);color:#a9c1ff
}
.contact-aside .ico svg{width:21px;height:21px}
.contact-aside h4{margin-bottom:4px;font-size:.98rem}
.contact-aside p{font-size:.9rem;margin-bottom:0}
.map-wrap{
  position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border-strong);
  aspect-ratio:21/8;background:rgba(10,14,28,.9)
}
.map-wrap img{width:100%;height:100%;object-fit:cover;opacity:.82}
.map-wrap .map-card{
  position:absolute;left:24px;bottom:24px;padding:18px 22px;border-radius:16px;
  background:rgba(6,9,20,.9);border:1px solid var(--border-strong);backdrop-filter:blur(12px);max-width:320px
}
.map-card h4{margin-bottom:6px;font-size:.98rem}
.map-card p{font-size:.86rem;margin-bottom:0;color:var(--text-dim)}

/* ---------- 22. 下载页 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-card{
  display:flex;flex-direction:column;padding:28px;border-radius:var(--r-lg);border:1px solid var(--border);
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));transition:.35s var(--ease)
}
.dl-card:hover{transform:translateY(-6px);border-color:rgba(79,124,255,.5);box-shadow:0 22px 54px rgba(3,6,18,.6)}
.dl-card.is-detected{border-color:rgba(52,211,153,.6);box-shadow:0 0 0 1px rgba(52,211,153,.35),0 18px 46px rgba(52,211,153,.16)}
.os-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.os-ico{
  width:50px;height:50px;border-radius:14px;flex:none;display:grid;place-items:center;
  background:var(--grad-soft);border:1px solid rgba(79,124,255,.34);color:#cfe0ff
}
.os-ico svg{width:26px;height:26px}
.os-name{font-weight:800;color:#fff;font-size:1.06rem}
.os-ver{font-size:.78rem;color:var(--muted)}
.dl-card .meta{font-size:.84rem;color:var(--muted);margin-bottom:4px}
.dl-card .meta b{color:var(--text-dim)}
.dl-card .btn{margin-top:18px}
.dl-badge{
  display:none;position:absolute;top:0;right:0;padding:6px 14px;border-bottom-left-radius:14px;border-top-right-radius:var(--r-lg);
  background:rgba(52,211,153,.16);border-left:1px solid rgba(52,211,153,.4);border-bottom:1px solid rgba(52,211,153,.4);
  font-size:.72rem;font-weight:800;color:#a7f3d0
}
.dl-card{position:relative}
.dl-card.is-detected .dl-badge{display:block}
.dl-note{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px;font-size:.84rem;color:var(--muted)}
.dl-note .chip{padding:7px 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text-dim)}

.table-wrap{overflow-x:auto;border-radius:var(--r-lg);border:1px solid var(--border)}
table.req{width:100%;border-collapse:collapse;font-size:.92rem;min-width:640px}
table.req th,table.req td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--border)}
table.req th{background:rgba(255,255,255,.05);font-weight:800;color:#fff;font-size:.88rem;letter-spacing:.03em}
table.req td{color:var(--text-dim)}
table.req tr:last-child td{border-bottom:0}
table.req tbody tr:hover{background:rgba(79,124,255,.06)}

.changelog{display:grid;gap:18px}
.cl-item{
  display:grid;grid-template-columns:120px 1fr;gap:22px;padding:24px;border-radius:var(--r-lg);
  border:1px solid var(--border);background:rgba(255,255,255,.035)
}
.cl-ver{font-family:var(--font-en);font-weight:800;color:#fff;font-size:1.05rem}
.cl-date{font-size:.78rem;color:var(--muted);margin-top:2px}
.cl-body h4{margin-bottom:10px;font-size:.98rem}
.cl-body ul{margin-bottom:0;font-size:.92rem}
.cl-tag{display:inline-block;padding:2px 10px;border-radius:6px;font-size:.7rem;font-weight:800;margin-right:8px;vertical-align:1px}
.cl-tag.new{background:rgba(52,211,153,.16);color:#a7f3d0;border:1px solid rgba(52,211,153,.4)}
.cl-tag.fix{background:rgba(251,191,36,.14);color:#fde68a;border:1px solid rgba(251,191,36,.38)}
.cl-tag.opt{background:rgba(79,124,255,.16);color:#c7d6ff;border:1px solid rgba(79,124,255,.4)}

.compare{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);min-width:700px}
.compare div{padding:14px 18px;border-bottom:1px solid var(--border);font-size:.9rem;color:var(--text-dim)}
.compare .head{background:rgba(255,255,255,.06);font-weight:800;color:#fff;font-size:.86rem}
.compare .rowlab{color:#fff;font-weight:600}
.compare .yes{color:#a7f3d0;font-weight:700}
.compare .no{color:#6f7c9c}

/* ---------- 23. CTA 横幅 ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-xl);padding:clamp(38px,5vw,64px) clamp(28px,4vw,60px);
  border:1px solid rgba(79,124,255,.45);
  background:
    radial-gradient(700px 320px at 15% 0%,rgba(79,124,255,.34),transparent 65%),
    radial-gradient(700px 320px at 85% 100%,rgba(139,92,246,.32),transparent 65%),
    linear-gradient(180deg,rgba(12,17,34,.94),rgba(8,12,24,.94));
  text-align:center;
}
.cta-band h2{margin-bottom:14px}
.cta-band p{max-width:62ch;margin:0 auto 28px;font-size:1.04rem}
.cta-band .btn-row{justify-content:center}

/* ---------- 24. 页脚 ---------- */
.site-footer{border-top:1px solid var(--border);background:linear-gradient(180deg,rgba(8,12,24,.7),rgba(4,6,13,.95));margin-top:0}
.footer-top{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:clamp(22px,3vw,44px);padding:clamp(46px,5vw,72px) 0 40px}
.footer-brand img{height:38px;margin-bottom:16px}
.footer-brand p{font-size:.9rem;max-width:34ch}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--border);background:var(--surface);color:var(--text-dim);transition:.25s
}
.footer-social a:hover{background:var(--grad);border-color:transparent;color:#fff;transform:translateY(-3px)}
.footer-social svg{width:18px;height:18px}
.footer-col h4{font-size:.92rem;letter-spacing:.04em;margin-bottom:16px;color:#fff}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:.89rem;color:var(--muted)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  padding:22px 0 30px;border-top:1px solid var(--border);font-size:.83rem;color:var(--muted)
}
.footer-bottom .legal{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom .legal a:hover{color:#fff}
.footer-note{font-size:.78rem;color:#5f6b8a;padding-bottom:26px;line-height:1.7}

/* ---------- 25. 返回顶部 ---------- */
.back-to-top{
  position:fixed;right:22px;bottom:26px;z-index:80;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;border:1px solid var(--border-strong);background:rgba(11,16,32,.9);
  backdrop-filter:blur(10px);color:#fff;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:.3s var(--ease)
}
.back-to-top.show{opacity:1;visibility:visible;transform:none}
.back-to-top:hover{background:var(--grad);border-color:transparent}
.back-to-top svg{width:18px;height:18px}

/* ---------- 26. 滚动显现动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* ---------- 26.5 通用工具类 ---------- */
.text-muted{color:var(--muted)}
.text-dim{color:var(--text-dim)}
.fz-xs{font-size:.74rem}
.fz-sm{font-size:.86rem}
.mb-0{margin-bottom:0}
.mt-16{margin-top:16px}
.mt-32{margin-top:32px}
.mt-48{margin-top:48px}
.wrap-x{overflow-x:auto}
.tag-inline{
  display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:6px;
  background:var(--surface);border:1px solid var(--border);font-size:.74rem;font-weight:700;color:var(--muted)
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- 27. 响应式 ---------- */
@media (max-width:1080px){
  .g-4,.stats,.team-grid,.contact-cards{grid-template-columns:repeat(2,1fr)}
  .dl-grid,.pricing,.steps{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr}
  .hero-grid,.split,.feature-row,.form-wrap{grid-template-columns:1fr}
  .feature-row.rev .feature-visual{order:0}
  .media-card.wide{grid-template-columns:1fr}
  .media-card.wide .thumb{min-height:220px}
  .step::after{display:none}
  .float-l{left:-10px;bottom:-18px}
  .float-r{right:-8px;top:-18px}
  .price-card.featured{transform:none}
  .office-grid{grid-auto-rows:170px}
}
@media (max-width:860px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:4px;
    padding:16px 22px 22px;background:rgba(6,9,20,.98);backdrop-filter:blur(18px);
    border-bottom:1px solid var(--border);box-shadow:0 22px 44px rgba(2,4,12,.6);
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:.28s var(--ease)
  }
  .nav-links.open{transform:none;opacity:1;visibility:visible}
  .nav-links a{padding:13px 14px;font-size:1rem;border-radius:12px}
  .nav-links a::after{display:none}
  .nav-links a[aria-current="page"]{background:var(--grad-soft);border:1px solid rgba(79,124,255,.35)}
  .nav-actions .btn{display:none}
  .g-3,.g-2{grid-template-columns:1fr}
  .hero-metrics{grid-template-columns:1fr 1fr}
  .app-body{grid-template-columns:1fr}
  .app-col+.app-col{border-left:0;border-top:1px solid var(--border)}
  .app-window{margin-top:10px}
  .cl-item{grid-template-columns:1fr;gap:12px}
  .footer-top{grid-template-columns:1fr 1fr}
  .office-grid{grid-template-columns:1fr 1fr}
  .office-grid .tall{grid-row:span 1}
  .faq-toolbar{flex-direction:column;align-items:stretch}
  .search-box{max-width:none}
  .map-wrap{aspect-ratio:4/3}
}
@media (max-width:560px){
  body{font-size:16px}
  .stats,.hero-metrics,.footer-top,.office-grid,.g-2,.g-3,.g-4,.dl-grid,.pricing,.steps,.team-grid,.contact-cards,.form-grid{grid-template-columns:1fr}
  .section{padding:52px 0}
  .card{padding:22px}
  .btn-lg{padding:14px 26px;font-size:1rem}
  .btn-row{flex-direction:column;align-items:stretch}
  .btn-row .btn{width:100%}
  .cta-band{padding:32px 22px}
  .topbar{font-size:.76rem}
  .faq-item summary{padding:17px 18px;font-size:.97rem}
  .faq-body{padding:0 18px 18px}
  .app-window{font-size:.86rem}
  .float-card{display:none}
}