/* ==========================================================================
   柒月星 QIYUE STAR — 落地页样式
   深圳柒月星科技有限公司
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root{
  /* 背景层 */
  --ink:        #05070E;
  --ink-2:      #080C16;
  --ink-3:      #0B1120;
  --surface:    rgba(255,255,255,.028);
  --surface-2:  rgba(255,255,255,.05);
  --line:       rgba(255,255,255,.08);
  --line-2:     rgba(255,255,255,.14);

  /* 文字 */
  --text:       #E9EDF7;
  --text-2:     #A6B1C8;
  --text-3:     #6E7B93;

  /* 品牌 */
  --brand:      #4C82FF;
  --brand-2:    #7A5CFF;
  --cyan:       #2FD8E6;
  --gold:       #FFC55A;
  --grad:       linear-gradient(100deg, #63A0FF 0%, #7A5CFF 55%, #2FD8E6 100%);

  /* 尺度 */
  --wrap:       1180px;
  --r-sm:       10px;
  --r:          16px;
  --r-lg:       22px;
  --shadow:     0 24px 60px -22px rgba(0,0,0,.75);
  --shadow-b:   0 18px 44px -14px rgba(76,130,255,.55);

  --ease:       cubic-bezier(.22,.8,.28,1);

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI", "Microsoft YaHei",
          "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC",
          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  --font-num: "SF Pro Display", "Segoe UI", Inter, Roboto, system-ui, var(--font);
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; scroll-padding-top:84px; }
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button,input,select,textarea{ font:inherit; color:inherit; }
h1,h2,h3,h4,p,ul,ol,figure{ margin:0; }
ul,ol{ padding:0; list-style:none; }
::selection{ background:rgba(122,92,255,.45); color:#fff; }

.skip-link{
  position:fixed; top:-100px; left:16px; z-index:200;
  background:var(--brand); color:#fff; padding:10px 18px; border-radius:0 0 10px 10px;
}
.skip-link:focus{ top:0; }
:focus-visible{ outline:2px solid var(--brand); outline-offset:3px; border-radius:6px; }

/* ---------- Layout ---------- */
.wrap{ width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:24px; }
.wrap--narrow{ max-width:860px; }
.section{ position:relative; padding:clamp(76px,9vw,132px) 0; }
.section--alt{
  background:
    radial-gradient(1200px 500px at 50% -10%, rgba(76,130,255,.07), transparent 62%),
    var(--ink-2);
  border-block:1px solid var(--line);
}

/* ---------- Typography helpers ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  font-size:13px; font-weight:600; letter-spacing:.16em;
  color:var(--text-2); text-transform:uppercase;
  margin-bottom:18px;
}
.eyebrow::before{
  content:""; width:22px; height:2px; border-radius:2px;
  background:var(--grad);
}
.grad{
  background:var(--grad);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}
h1,h2,h3{ font-weight:700; line-height:1.25; letter-spacing:-.01em; text-wrap:balance; }
p{ text-wrap:pretty; }

.sec-head{ max-width:720px; margin:0 auto clamp(44px,5vw,68px); text-align:center; }
.sec-head--left{ margin-inline:0; text-align:left; }
.sec-head h2{ font-size:clamp(28px,4vw,44px); }
.sec-head__lead{ margin-top:18px; color:var(--text-2); font-size:clamp(15px,1.3vw,17px); }

/* ---------- Buttons ---------- */
.btn{
  --bg:transparent;
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding:12px 22px; border-radius:999px; border:1px solid var(--line-2);
  background:var(--bg); color:var(--text);
  font-size:15px; font-weight:600; white-space:nowrap; cursor:pointer;
  transition:transform .28s var(--ease), box-shadow .28s var(--ease),
             background-color .28s var(--ease), border-color .28s var(--ease), opacity .2s;
}
.btn:hover{ transform:translateY(-2px); }
.btn:active{ transform:translateY(0); }
.btn--sm{ padding:8px 16px; font-size:14px; }
.btn--lg{ padding:15px 30px; font-size:16px; }
.btn--block{ width:100%; }
.btn--primary{
  border-color:transparent; color:#fff;
  background-image:var(--grad); background-size:160% 100%; background-position:0% 50%;
  box-shadow:var(--shadow-b);
  transition:transform .28s var(--ease), box-shadow .28s var(--ease), background-position .5s var(--ease);
}
.btn--primary:hover{ background-position:100% 50%; box-shadow:0 22px 52px -12px rgba(122,92,255,.68); }
.btn--ghost{ background:var(--surface); backdrop-filter:blur(8px); }
.btn--ghost:hover{ background:var(--surface-2); border-color:var(--line-2); }

/* ==========================================================================
   导航
   ========================================================================== */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:100;
  transition:background-color .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(5,7,14,.78);
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom-color:var(--line);
}
.nav__inner{ display:flex; align-items:center; gap:28px; height:72px; }

.brand{ display:inline-flex; align-items:center; gap:11px; flex:0 0 auto; }
.brand__mark{ width:36px; color:var(--text); display:block; transition:color .3s var(--ease); }
.brand:hover .brand__mark{ color:var(--brand); }
.brand__text{ display:flex; flex-direction:column; line-height:1.1; }
.brand__text b{ font-size:19px; font-weight:700; letter-spacing:.06em; }
.brand__text i{
  font-style:normal; font-size:9.5px; font-weight:600;
  letter-spacing:.22em; color:var(--text-3);
}

.nav__links{ display:flex; align-items:center; gap:4px; margin-left:auto; }
.nav__links > a:not(.btn){
  padding:8px 13px; border-radius:9px; font-size:14.5px; color:var(--text-2);
  transition:color .25s, background-color .25s;
}
.nav__links > a:not(.btn):hover{ color:var(--text); background:var(--surface-2); }
.nav__links > a.is-current{ color:var(--text); }
.nav__cta{ margin-left:10px; }

.nav__toggle{
  display:none; width:42px; height:42px; margin-left:auto;
  background:var(--surface); border:1px solid var(--line); border-radius:11px;
  cursor:pointer; padding:0; place-items:center;
}
.nav__toggle span{
  display:block; width:17px; height:1.7px; border-radius:2px; background:var(--text);
  margin:3.4px auto; transition:transform .3s var(--ease), opacity .2s;
}
.nav__toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(5.1px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-5.1px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  position:relative; overflow:hidden;
  padding:clamp(132px,17vw,190px) 0 0;
  min-height:min(100svh,940px);
  display:flex; flex-direction:column; justify-content:center;
}
.hero__canvas{ position:absolute; inset:0; width:100%; height:100%; opacity:.85; }
.hero__glow{
  position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(760px 460px at 18% 8%,  rgba(76,130,255,.28), transparent 62%),
    radial-gradient(680px 480px at 84% 26%, rgba(122,92,255,.22), transparent 64%),
    radial-gradient(900px 420px at 50% 104%, rgba(47,216,230,.10), transparent 68%);
}
.hero__grid{
  position:absolute; inset:0; pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:74px 74px;
  mask-image:radial-gradient(circle at 50% 34%, #000 0%, transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 34%, #000 0%, transparent 72%);
}
.hero__inner{ position:relative; z-index:2; text-align:center; padding-bottom:clamp(56px,7vw,88px); }
.hero__title{
  font-size:clamp(34px,6.2vw,68px);
  line-height:1.16; letter-spacing:-.02em;
  margin-bottom:26px;
}
.hero__lead{
  max-width:660px; margin:0 auto; color:var(--text-2);
  font-size:clamp(15px,1.45vw,18px); line-height:1.85;
}
.hero__actions{
  display:flex; flex-wrap:wrap; justify-content:center; gap:14px;
  margin-top:38px;
}

.hero__stats{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:1px; margin-top:clamp(52px,6vw,80px);
  background:var(--line); border:1px solid var(--line);
  border-radius:var(--r-lg); overflow:hidden;
  backdrop-filter:blur(10px);
}
.hero__stats li{
  background:rgba(8,12,22,.72);
  padding:26px 18px;
  display:flex; flex-direction:column; gap:7px; align-items:center;
}
.hero__stats b{
  font-family:var(--font-num);
  font-size:clamp(24px,3vw,34px); font-weight:700; letter-spacing:-.02em;
  background:var(--grad); -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
  font-variant-numeric:tabular-nums;
}
.hero__stats span{ font-size:13.5px; color:var(--text-3); }

/* 走马灯 */
.marquee{
  position:relative; z-index:2;
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.018);
  overflow:hidden; padding:15px 0;
  mask-image:linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image:linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track{
  display:flex; align-items:center; gap:26px; width:max-content;
  animation:marquee 42s linear infinite;
  font-size:14px; color:var(--text-3); letter-spacing:.08em; white-space:nowrap;
}
.marquee__track span:nth-child(2n){ color:var(--brand); opacity:.55; }
@keyframes marquee{ to{ transform:translateX(-50%); } }

/* ==========================================================================
   Tabs + 产品卡片
   ========================================================================== */
.tabs{
  position:relative; display:flex; flex-wrap:wrap; justify-content:center; gap:6px;
  margin-bottom:44px; padding:6px;
  background:var(--surface); border:1px solid var(--line);
  border-radius:999px; width:fit-content; margin-inline:auto;
}
.tabs__btn{
  position:relative; z-index:1;
  padding:10px 22px; border:0; background:transparent; border-radius:999px;
  font-size:14.5px; font-weight:600; color:var(--text-3); cursor:pointer;
  transition:color .3s var(--ease);
}
.tabs__btn:hover{ color:var(--text-2); }
.tabs__btn.is-active{ color:#fff; }
.tabs__ink{
  position:absolute; z-index:0; top:6px; left:6px; height:calc(100% - 12px);
  border-radius:999px; background-image:var(--grad);
  box-shadow:0 8px 22px -8px rgba(122,92,255,.7);
  transition:transform .42s var(--ease), width .42s var(--ease);
}

.panel{ display:none; }
.panel.is-active{ display:block; animation:panelIn .45s var(--ease) both; }
@keyframes panelIn{ from{ opacity:0; transform:translateY(12px); } to{ opacity:1; transform:none; } }

.cards{
  display:grid; gap:18px;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
}
.card{
  position:relative; overflow:hidden;
  padding:30px 28px 28px;
  background:linear-gradient(168deg, rgba(255,255,255,.052), rgba(255,255,255,.018));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  transition:transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.card::before{
  content:""; position:absolute; inset:-1px; border-radius:inherit; pointer-events:none;
  background:radial-gradient(420px 220px at var(--mx,50%) var(--my,0%), rgba(122,92,255,.20), transparent 70%);
  opacity:0; transition:opacity .4s var(--ease);
}
.card:hover{
  transform:translateY(-5px);
  border-color:var(--line-2);
  box-shadow:var(--shadow);
}
.card:hover::before{ opacity:1; }
.card__ico{
  width:48px; height:48px; margin-bottom:20px;
  display:grid; place-items:center;
  border-radius:14px;
  background:linear-gradient(150deg, rgba(76,130,255,.22), rgba(122,92,255,.14));
  border:1px solid rgba(122,92,255,.30);
  color:#A8C4FF;
}
.card__ico svg{ width:23px; height:23px; stroke-linecap:round; stroke-linejoin:round; }
.card h3{ font-size:19px; margin-bottom:11px; }
.card > p{ color:var(--text-2); font-size:14.7px; line-height:1.8; }
.card__list{ margin-top:18px; padding-top:16px; border-top:1px dashed var(--line); }
.card__list li{
  position:relative; padding-left:19px; font-size:13.6px; color:var(--text-3);
  line-height:1.95;
}
.card__list li::before{
  content:""; position:absolute; left:2px; top:.82em;
  width:5px; height:5px; border-radius:50%; background:var(--brand); opacity:.75;
}

/* ==========================================================================
   节点
   ========================================================================== */
.nodes{
  display:grid; gap:18px;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
}
.nodes__group{
  padding:28px 26px;
  background:var(--surface); border:1px solid var(--line); border-radius:var(--r-lg);
}
.nodes__title{
  display:flex; align-items:center; gap:10px;
  font-size:16px; margin-bottom:18px; padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.dot{ width:8px; height:8px; border-radius:50%; flex:0 0 auto; }
.dot--cn{ background:var(--brand);  box-shadow:0 0 0 4px rgba(76,130,255,.16); }
.dot--hk{ background:var(--brand-2);box-shadow:0 0 0 4px rgba(122,92,255,.16); }
.dot--ov{ background:var(--cyan);   box-shadow:0 0 0 4px rgba(47,216,230,.16); }
.nodes__list li{
  display:flex; align-items:baseline; justify-content:space-between; gap:14px;
  padding:9px 0; border-bottom:1px dashed rgba(255,255,255,.06);
}
.nodes__list li:last-child{ border-bottom:0; }
.nodes__list b{ font-size:15px; font-weight:600; }
.nodes__list span{ font-size:12.8px; color:var(--text-3); text-align:right; }

.specs{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:18px; margin-top:20px;
}
.spec{
  padding:24px; text-align:center;
  background:linear-gradient(168deg, rgba(255,255,255,.05), rgba(255,255,255,.015));
  border:1px solid var(--line); border-radius:var(--r);
}
.spec b{
  display:block; font-family:var(--font-num);
  font-size:27px; font-weight:700; letter-spacing:-.01em; margin-bottom:6px;
  background:var(--grad); -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}
.spec span{ font-size:13px; color:var(--text-3); }

/* ==========================================================================
   解决方案
   ========================================================================== */
.sol{
  display:grid; gap:1px;
  grid-template-columns:repeat(auto-fit,minmax(320px,1fr));
  background:var(--line); border:1px solid var(--line);
  border-radius:var(--r-lg); overflow:hidden;
}
.sol__item{
  position:relative; background:var(--ink);
  padding:34px 30px 30px;
  transition:background-color .4s var(--ease);
}
.sol__item::after{
  content:""; position:absolute; left:0; right:0; top:0; height:2px;
  background-image:var(--grad); transform:scaleX(0); transform-origin:left;
  transition:transform .5s var(--ease);
}
.sol__item:hover{ background:var(--ink-3); }
.sol__item:hover::after{ transform:scaleX(1); }
.sol__no{
  display:block; font-family:var(--font-num);
  font-size:13px; font-weight:700; letter-spacing:.14em;
  color:var(--text-3); margin-bottom:14px;
}
.sol__item h3{ font-size:19px; margin-bottom:11px; }
.sol__item p{ color:var(--text-2); font-size:14.6px; line-height:1.85; }
.chips{ display:flex; flex-wrap:wrap; gap:8px; margin-top:18px; }
.chips span{
  padding:5px 12px; border-radius:999px; font-size:12.4px;
  background:rgba(76,130,255,.10); border:1px solid rgba(76,130,255,.22);
  color:#A8C4FF;
}

/* ==========================================================================
   为什么选择我们
   ========================================================================== */
.why{ display:grid; grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr); gap:clamp(40px,6vw,84px); align-items:start; }
.why__left{ position:sticky; top:104px; }
.why__left h2{ font-size:clamp(28px,3.6vw,42px); }
.why__lead{ margin:20px 0 30px; color:var(--text-2); font-size:16px; }
.why__mark{
  position:absolute; right:4%; bottom:-52%; width:min(250px,44%);
  color:rgba(255,255,255,.026); pointer-events:none; z-index:-1;
}

.why__right{ display:grid; gap:14px; }
.feat{
  display:flex; gap:20px; align-items:flex-start;
  padding:24px 26px;
  background:var(--surface); border:1px solid var(--line); border-radius:var(--r);
  transition:transform .35s var(--ease), border-color .35s var(--ease), background-color .35s var(--ease);
}
.feat:hover{ transform:translateX(6px); border-color:var(--line-2); background:var(--surface-2); }
.feat > b{
  flex:0 0 auto; width:38px; height:38px; display:grid; place-items:center;
  border-radius:11px; font-family:var(--font-num); font-size:14px; font-weight:700;
  background:linear-gradient(150deg, rgba(76,130,255,.2), rgba(122,92,255,.12));
  border:1px solid rgba(122,92,255,.28); color:#A8C4FF;
}
.feat h3{ font-size:17px; margin-bottom:7px; }
.feat p{ color:var(--text-2); font-size:14.3px; line-height:1.8; }

/* ==========================================================================
   服务流程
   ========================================================================== */
.steps{
  display:grid; gap:18px;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  counter-reset:step;
}
.step{
  position:relative; padding:28px 24px;
  background:linear-gradient(170deg, rgba(255,255,255,.05), rgba(255,255,255,.015));
  border:1px solid var(--line); border-radius:var(--r);
  transition:transform .35s var(--ease), border-color .35s var(--ease);
}
.step:hover{ transform:translateY(-4px); border-color:var(--line-2); }
.step:not(:last-child)::after{
  content:""; position:absolute; right:-13px; top:50%; width:8px; height:8px;
  border-top:1.5px solid var(--line-2); border-right:1.5px solid var(--line-2);
  transform:translateY(-50%) rotate(45deg);
}
.step__n{
  display:grid; place-items:center; width:34px; height:34px; margin-bottom:16px;
  border-radius:50%; font-family:var(--font-num); font-size:14px; font-weight:700; color:#fff;
  background-image:var(--grad); box-shadow:0 8px 20px -8px rgba(122,92,255,.8);
}
.step h3{ font-size:16.5px; margin-bottom:9px; }
.step p{ color:var(--text-2); font-size:13.8px; line-height:1.8; }

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq{ display:grid; gap:12px; }
.faq__item{
  background:var(--surface); border:1px solid var(--line);
  border-radius:var(--r); overflow:hidden;
  transition:border-color .3s var(--ease), background-color .3s var(--ease);
}
.faq__item[open]{ border-color:rgba(122,92,255,.34); background:var(--surface-2); }
.faq__item summary{
  position:relative; cursor:pointer; list-style:none;
  padding:20px 56px 20px 24px;
  font-size:16px; font-weight:600; line-height:1.6;
}
.faq__item summary::-webkit-details-marker{ display:none; }
.faq__item summary::after{
  content:""; position:absolute; right:24px; top:50%;
  width:9px; height:9px; margin-top:-6px;
  border-right:1.8px solid var(--text-3); border-bottom:1.8px solid var(--text-3);
  transform:rotate(45deg); transform-origin:center;
  transition:transform .32s var(--ease), border-color .32s;
}
.faq__item[open] summary::after{ transform:rotate(-135deg); margin-top:-2px; border-color:var(--brand); }
.faq__body{ padding:0 24px 22px; }
.faq__body p{ color:var(--text-2); font-size:14.6px; line-height:1.9; }

/* ==========================================================================
   CTA / 表单
   ========================================================================== */
.cta{ position:relative; overflow:hidden; }
.cta__glow{
  position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(700px 400px at 12% 10%, rgba(76,130,255,.18), transparent 62%),
    radial-gradient(700px 420px at 90% 82%, rgba(122,92,255,.16), transparent 64%);
}
.cta__inner{
  position:relative; z-index:1;
  display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:clamp(38px,5vw,72px); align-items:start;
}
.cta__text h2{ font-size:clamp(27px,3.4vw,40px); }
.cta__lead{ margin:20px 0 32px; color:var(--text-2); font-size:15.6px; }

.contact-list{ display:grid; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; }
.contact-list li{
  display:flex; flex-wrap:wrap; align-items:baseline; gap:6px 18px;
  padding:16px 20px; background:var(--ink-2);
}
.contact-list__k{ flex:0 0 76px; font-size:13px; color:var(--text-3); }
.contact-list__v{ font-size:15px; font-weight:500; transition:color .25s; }
a.contact-list__v{ color:#A8C4FF; }
a.contact-list__v:hover{ color:var(--cyan); }

.form{
  display:grid; gap:16px;
  padding:clamp(26px,3vw,36px);
  background:rgba(11,17,32,.68);
  backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line-2); border-radius:var(--r-lg);
  box-shadow:var(--shadow);
}
.form__row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.field{ display:grid; gap:8px; }
.field > span{ font-size:13.4px; color:var(--text-2); font-weight:500; }
.field > span i{ color:#FF7A85; font-style:normal; }
.field input,.field select,.field textarea{
  width:100%; padding:12px 14px;
  background:rgba(255,255,255,.04); border:1px solid var(--line);
  border-radius:var(--r-sm); font-size:15px;
  transition:border-color .25s, background-color .25s, box-shadow .25s;
  appearance:none; -webkit-appearance:none;
}
.field textarea{ resize:vertical; min-height:104px; line-height:1.7; }
.field select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1.5L6 6.5L11 1.5' stroke='%236E7B93' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat:no-repeat; background-position:right 14px center;
  padding-right:38px; cursor:pointer;
}
.field select option{ background:#0B1120; color:var(--text); }
.field input::placeholder,.field textarea::placeholder{ color:var(--text-3); }
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--brand);
  background:rgba(76,130,255,.07);
  box-shadow:0 0 0 3px rgba(76,130,255,.14);
}
.field.is-invalid input,.field.is-invalid select{
  border-color:#FF7A85; box-shadow:0 0 0 3px rgba(255,122,133,.14);
}
.form__note{ font-size:12.4px; color:var(--text-3); line-height:1.7; text-align:center; }
.form__status{ font-size:14px; text-align:center; min-height:1.2em; }
.form__status.is-ok{ color:#5FE3A1; }
.form__status.is-err{ color:#FF7A85; }

/* ==========================================================================
   页脚
   ========================================================================== */
.footer{
  background:var(--ink-2);
  border-top:1px solid var(--line);
  padding-top:clamp(52px,6vw,76px);
}
.footer__inner{
  display:grid; gap:40px;
  grid-template-columns:minmax(240px,1.5fr) repeat(3,minmax(120px,1fr));
  padding-bottom:44px;
}
.footer__desc{ margin-top:18px; color:var(--text-3); font-size:13.6px; line-height:1.85; }
.footer__contact{ display:flex; flex-wrap:wrap; gap:6px 20px; margin-top:14px; font-size:13.8px; }
.footer__contact a{ color:#A8C4FF; transition:color .22s; }
.footer__contact a:hover{ color:var(--cyan); }
.footer__col h3{ font-size:14px; margin-bottom:16px; color:var(--text); }
.footer__col a{
  display:block; padding:5px 0; font-size:13.8px; color:var(--text-3);
  transition:color .22s, transform .22s var(--ease);
}
.footer__col a:hover{ color:var(--text); transform:translateX(3px); }
.footer__bottom{
  display:flex; flex-wrap:wrap; justify-content:space-between; gap:10px 24px;
  padding-block:22px; border-top:1px solid var(--line);
  font-size:12.6px; color:var(--text-3);
}
.footer__bottom a:hover{ color:var(--text-2); }

/* ---------- 浮动咨询 ---------- */
.fab{
  position:fixed; right:22px; bottom:22px; z-index:90;
  display:inline-flex; align-items:center; gap:9px;
  padding:13px 20px; border-radius:999px; color:#fff; font-size:14.5px; font-weight:600;
  background-image:var(--grad); box-shadow:0 16px 38px -12px rgba(122,92,255,.75);
  opacity:0; transform:translateY(20px) scale(.94); pointer-events:none;
  transition:opacity .4s var(--ease), transform .4s var(--ease);
}
.fab.is-on{ opacity:1; transform:none; pointer-events:auto; }
.fab:hover{ transform:translateY(-3px); }
.fab svg{ width:18px; height:18px; stroke-linecap:round; stroke-linejoin:round; }

/* ==========================================================================
   滚动动画
   ========================================================================== */
.reveal{
  opacity:0; transform:translateY(22px);
  transition:opacity .8s var(--ease) var(--d,0s), transform .8s var(--ease) var(--d,0s);
  will-change:opacity, transform;
}
.reveal.is-in{ opacity:1; transform:none; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1080px){
  .why{ grid-template-columns:1fr; }
  .why__left{ position:static; }
  .why__mark{ display:none; }
  .cta__inner{ grid-template-columns:1fr; }
  .footer__inner{ grid-template-columns:1fr 1fr; }
}

@media (max-width:860px){
  html{ scroll-padding-top:72px; }
  .nav__toggle{ display:grid; }
  .nav__inner{ height:64px; }
  .nav{ background:rgba(5,7,14,.82); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px); border-bottom-color:var(--line); }
  .nav__links{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:2px;
    padding:12px 20px 22px;
    background:rgba(6,9,17,.97);
    backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);
    clip-path:inset(0 0 100% 0); opacity:0; pointer-events:none;
    transition:clip-path .42s var(--ease), opacity .3s var(--ease);
  }
  .nav__links.is-open{ clip-path:inset(0 0 0 0); opacity:1; pointer-events:auto; }
  .nav__links > a:not(.btn){ padding:13px 12px; font-size:15.5px; border-radius:10px; }
  .nav__cta{ margin:10px 0 0; }

  .hero{ min-height:auto; padding-top:118px; }
  .hero__stats{ grid-template-columns:1fr 1fr; }
  .hero__actions .btn{ flex:1 1 auto; }

  .steps{ grid-template-columns:1fr; }
  .step:not(:last-child)::after{
    right:auto; left:50%; top:auto; bottom:-13px;
    transform:translateX(-50%) rotate(135deg);
  }
  .form__row{ grid-template-columns:1fr; }
  .tabs{ width:100%; border-radius:var(--r); }
  .tabs__btn{ flex:1 1 auto; padding:10px 12px; font-size:13.6px; }
  .tabs__ink{ border-radius:calc(var(--r) - 6px); }
  .fab span{ display:none; }
  .fab{ padding:15px; right:16px; bottom:16px; }
}

@media (max-width:560px){
  .wrap{ padding-inline:18px; }
  .footer__inner{ grid-template-columns:1fr; gap:30px; }
  .footer__bottom{ flex-direction:column; text-align:center; align-items:center; }
  .contact-list li{ flex-direction:column; gap:4px; }
  .card{ padding:26px 22px; }
}

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