@charset "UTF-8";
/* =========================================================================
   实验室资源网（LabR.cc） · 免费试用申请页样式表
   -------------------------------------------------------------------------
   目录：
     01. 设计变量（Design Tokens）
     02. 基础重置（Reset & Base）
     03. 通用工具类（Container / 无障碍）
     04. 按钮（Button）
     05. 顶部导航（Header / Nav）
     06. 首屏 Hero
     07. 平台能力（Features）
     08. 申请试用（Trial + Form）
     09. 提交成功态（Success）
     10. 页脚（Footer）
     11. 全局提示（Toast）
     12. 右侧悬浮联系方式（Side Contact）
     13. 响应式（Responsive）
   ========================================================================= */

/* ===== 01. 设计变量 ===== */
:root{
  --navy-900:#0A1E3C;
  --navy-800:#0E2A52;
  --blue-700:#1154C6;
  --blue-600:#1B6FF0;
  --blue-500:#3D8BFF;
  --cyan-500:#12C2E9;
  --cyan-400:#38D6F0;
  --ink:#16233B;
  --ink-2:#5B6B84;
  --ink-3:#8A98AE;
  --line:#DCE6F2;
  --bg:#F4F8FD;
  --bg-deep:#EAF2FB;
  --card:#FFFFFF;
  --ok:#0FA968;
  --err:#E5484D;
  --grad:linear-gradient(135deg,#1158D8 0%,#1B6FF0 42%,#12C2E9 100%);
  --shadow-sm:0 1px 2px rgba(10,30,60,.06);
  --shadow-md:0 10px 30px rgba(10,30,60,.10);
  --shadow-lg:0 22px 48px rgba(10,30,60,.14);
  --radius:14px;
  --header-h:68px;
}

/* ===== 02. 基础重置 ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}
body{
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:var(--bg);
  font-size:15px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
/* img{display:block;max-width:100%}*/
:focus-visible{outline:2px solid var(--blue-500);outline-offset:2px;border-radius:4px}

/* ===== 03. 通用工具类 ===== */
.container{max-width:1180px;margin:0 auto;padding:0 24px}
ul{list-style:none}
.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;
}
.skip-link{
  position:absolute;left:50%;top:-60px;transform:translateX(-50%);
  z-index:200;background:var(--navy-900);color:#fff;
  padding:10px 18px;border-radius:0 0 10px 10px;font-size:14px;font-weight:600;
  transition:top .2s ease;
}
.skip-link:focus{top:0}

/* ===== 04. 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;border-radius:11px;font-weight:700;font-size:15px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
  will-change:transform;
}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{
  background:var(--grad);color:#fff;padding:12px 24px;
  box-shadow:0 8px 20px rgba(27,111,240,.32);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,111,240,.4)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:#fff;color:var(--blue-600);padding:12px 24px;border:1.5px solid #C9DCF8;
}
.btn-ghost:hover{background:#F0F6FF;border-color:var(--blue-500)}
.btn-lg{padding:14px 30px;font-size:16px;border-radius:13px}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:9px}

/* ===== 05. 顶部导航 ===== */
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.header.scrolled{box-shadow:0 6px 20px rgba(10,30,60,.08)}
.header-inner{display:flex;align-items:center;justify-content:flex-start;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:19px;color:var(--navy-900);letter-spacing:.5px}
.brand .logo{
  width:36px;height:36px;border-radius:10px;
  background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(27,111,240,.35);
}
.brand .logo-img{height:42px;width:auto;display:block}
.brand .logo svg{width:20px;height:20px}
.brand small{display:block;font-size:10px;font-weight:500;color:var(--ink-3);letter-spacing:2px;line-height:1.2}
.nav{display:flex;align-items:center;gap:40px;margin-left:48px}
.nav a.link{font-size:14.5px;color:var(--ink-2);font-weight:500;position:relative;transition:color .2s}
.nav a.link:hover{color:var(--blue-600)}
.nav a.link::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;border-radius:2px;background:var(--grad);transition:width .25s ease}
.nav a.link:hover::after{width:100%}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.link-login{font-size:14px;color:var(--ink-2);font-weight:500;transition:color .2s}
.link-login:hover{color:var(--blue-600)}
.menu-btn{display:none;width:38px;height:38px;border:1px solid var(--line);border-radius:9px;background:#fff;align-items:center;justify-content:center}
.menu-btn svg{width:18px;height:18px;stroke:var(--navy-900)}
.mobile-nav{
  display:none;flex-direction:column;gap:4px;padding:10px 24px 16px;
  border-top:1px solid var(--line);background:#fff;
}
.mobile-nav a{padding:11px 6px;font-size:15px;color:var(--ink);font-weight:500;border-radius:8px}
.mobile-nav a:hover{background:var(--bg)}
.mobile-nav .cta{margin-top:8px;text-align:center}

/* ===== 06. 首屏 Hero ===== */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 420px at 12% -10%,rgba(27,111,240,.14),transparent 60%),
    radial-gradient(760px 400px at 95% 12%,rgba(18,194,233,.14),transparent 60%),
    linear-gradient(180deg,#FBFDFF 0%,var(--bg) 100%);
}
.hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(27,111,240,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,111,240,.05) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
}
.hero-inner{
  position:relative;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding:64px 24px 24px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:2.5px;color:var(--blue-600);
  background:rgba(27,111,240,.08);border:1px solid rgba(27,111,240,.18);
  padding:7px 14px;border-radius:999px;margin-bottom:22px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan-500);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{
  font-size:clamp(34px,4.6vw,54px);
  line-height:1.18;font-weight:900;color:var(--navy-900);letter-spacing:.5px;
  margin-bottom:16px;
}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:17px;color:var(--ink-2);max-width:34em;margin-bottom:22px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-img{
  border-radius:20px;overflow:hidden;box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.6);
}
.hero-img img{width:100%;height:360px;object-fit:cover}
.chip{
  position:absolute;display:flex;align-items:center;gap:8px;
  background:#fff;border-radius:12px;padding:10px 15px;
  box-shadow:var(--shadow-md);font-size:13px;font-weight:600;color:var(--navy-900);
}
.chip svg{width:16px;height:16px;color:var(--ok);flex:none}
.chip small{display:block;font-size:11px;font-weight:500;color:var(--ink-3)}
.chip-1{top:18px;left:-14px}
.chip-2{bottom:22px;right:-12px}
.chip-2 svg{color:var(--blue-500)}

/* ===== 07. 平台能力 ===== */
.features{padding:24px 0}
.section-head{max-width:640px;margin-bottom:40px}
.section-head .kicker{font-size:13px;font-weight:700;letter-spacing:2px;color:var(--blue-600);margin-bottom:10px}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:900;color:var(--navy-900);line-height:1.3;margin-bottom:12px}
.section-head p{color:var(--ink-2);font-size:15px}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feat-grid+.feat-grid{margin-top:24px}
.feat{
  position:relative;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#C3DAFA}
.feat .icon{
  width:46px;height:46px;border-radius:12px;margin-bottom:16px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(27,111,240,.12),rgba(18,194,233,.12));
  border:1px solid rgba(27,111,240,.16);
}
.feat .icon svg{width:23px;height:23px;stroke:var(--blue-600)}
.feat h3{font-size:16.5px;font-weight:700;color:var(--navy-900);margin-bottom:8px}
.feat p{font-size:13.5px;color:var(--ink-2);line-height:1.65}
/* 卡片标题链接：伪元素拉伸覆盖整张卡片，卡片布局与原来完全一致 */
.feat h3 .feat-link{color:inherit}
.feat h3 .feat-link::after{content:"";position:absolute;inset:0;border-radius:var(--radius)}

/* ===== 08. 申请试用 ===== */
.trial{
  position:relative;
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg-deep) 100%);
  padding:24px 0 90px;
}
.trial-grid{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start;
}
.trial-left .kicker{font-size:13px;font-weight:700;letter-spacing:2px;color:var(--blue-600);margin-bottom:10px}
.trial-left h2{font-size:clamp(26px,3.2vw,36px);font-weight:900;color:var(--navy-900);line-height:1.28;margin-bottom:16px}
.trial-left>p{color:var(--ink-2);font-size:15.5px;margin-bottom:28px;max-width:30em}
.point{display:flex;gap:14px;align-items:flex-start;margin-bottom:18px}
.point .tick{
  flex:none;width:26px;height:26px;border-radius:50%;margin-top:2px;
  background:linear-gradient(135deg,#17B26A,#0FA968);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 10px rgba(15,169,104,.3);
}
.point .tick svg{width:13px;height:13px;stroke:#fff}
.point b{display:block;font-size:15.5px;font-weight:700;color:var(--navy-900);margin-bottom:2px}
.point span{font-size:13.5px;color:var(--ink-2)}
.contact-box{
  margin-top:32px;display:flex;gap:26px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:22px;
}
.contact-box div{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--ink-2);font-weight:500}
.contact-box svg{width:16px;height:16px;color:var(--blue-600);flex:none}

.form-card{
  position:relative;background:var(--card);border-radius:22px;
  padding:38px 36px 32px;box-shadow:var(--shadow-lg);border:1px solid var(--line);
}
.promo-tag{
  position:absolute;top:-14px;right:26px;
  background:var(--grad);color:#fff;
  font-size:12.5px;font-weight:700;letter-spacing:.5px;
  padding:8px 16px;border-radius:999px;
  box-shadow:0 8px 18px rgba(27,111,240,.35);
  transform:rotate(2.5deg);
}
.form-card h3{font-size:24px;font-weight:900;color:var(--navy-900);margin-bottom:6px}
.form-card .form-sub{font-size:13.5px;color:var(--ink-3);margin-bottom:26px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--navy-900);margin-bottom:7px}
.field label i{font-style:normal;color:var(--err);margin-left:2px}
.field .input-wrap{position:relative}
.field input,.field textarea,.field select{
  width:100%;border:1px solid var(--line);border-radius:11px;
  padding:12px 14px;font-size:14.5px;font-family:inherit;color:var(--ink);
  background:#FBFDFF;transition:border-color .2s,box-shadow .2s,background .2s;
  outline:none;
}
.field select{
  appearance:none;-webkit-appearance:none;-moz-appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236B7C93' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;background-size:16px;
  padding-right:38px;cursor:pointer;
}
.field input::placeholder,.field textarea::placeholder{color:#AAB7C9}
.field input:focus,.field textarea:focus,.field select:focus{
  border-color:var(--blue-500);background:#fff;
  box-shadow:0 0 0 3px rgba(27,111,240,.12);
}
.field.error input,.field.error textarea,.field.error select{border-color:var(--err);background:#FFF9F9}
.field.error input:focus,.field.error select:focus{box-shadow:0 0 0 3px rgba(229,72,77,.12)}
.field .err-msg{display:none;font-size:12px;color:var(--err);margin-top:5px}
.field.error .err-msg{display:block}
.field textarea{resize:vertical;min-height:78px}
.code-row{display:flex;gap:10px}
.code-row input{flex:1}
.btn-code{
  flex:none;border:1px solid #C9DCF8;background:#F0F6FF;color:var(--blue-600);
  font-size:13.5px;font-weight:700;border-radius:11px;padding:0 16px;
  transition:background .2s,border-color .2s;
}
.btn-code:hover:not(:disabled){background:#E3EFFE}
.btn-code:disabled{color:#9AA9BE;background:#F0F3F8;border-color:var(--line);cursor:not-allowed}
.agree-row{display:flex;align-items:flex-start;gap:9px;margin:6px 0 4px}
.agree-row input{
  width:19px;height:19px;margin-top:2px;flex:none;
  accent-color:var(--blue-600);cursor:pointer;
}
.agree-row label{font-size:13px;color:var(--ink-2);cursor:pointer;user-select:none}
.agree-row a{color:var(--blue-600);font-weight:600}
.agree-row a:hover{text-decoration:underline}
.privacy-line{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--ink-3);margin:10px 0 20px}
.privacy-line svg{width:14px;height:14px;color:var(--ok);flex:none}
.btn-submit{width:100%;padding:15px;font-size:16px;border-radius:13px;color:#fff;background:var(--grad);font-weight:700;box-shadow:0 10px 24px rgba(27,111,240,.32)}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(27,111,240,.42)}
.btn-submit:active{transform:translateY(0)}
.form-login{text-align:center;margin-top:16px;font-size:13.5px;color:var(--ink-3)}
.form-login a{color:var(--blue-600);font-weight:600}
.form-login a:hover{text-decoration:underline}

/* ===== 08b. Element Plus 表单（el-form-item）兼容样式 ===== */
/* 说明：el-form-item 被赋予 class="field"，内部原生控件仍走上方 .field 规则；
   此处仅把 el-form-item 自身的默认样式对齐原 .field 视觉，避免影响既有样式。 */
.form-card .el-form-item{display:block;margin-bottom:16px}
.form-card .el-form-item__content{display:block;line-height:normal}
.form-card .el-form-item__label{
  display:block;padding:0;height:auto;line-height:1.4;
  font-size:13.5px;font-weight:600;color:var(--navy-900);margin-bottom:7px;
}
.form-card .el-form-item__error{
  position:static;margin-top:5px;
  font-size:12px;line-height:1.4;color:var(--err);
}
.form-card .el-form-item.is-error input,
.form-card .el-form-item.is-error select,
.form-card .el-form-item.is-error textarea{border-color:var(--err);background:#FFF9F9}

/* ===== 09. 提交成功态 ===== */
.success{display:none;text-align:center;padding:38px 10px 24px}
.success.show{display:block}
.success .ring{
  width:78px;height:78px;border-radius:50%;margin:0 auto 20px;
  background:linear-gradient(135deg,#17B26A,#0FA968);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 14px 30px rgba(15,169,104,.35);
  animation:pop .45s cubic-bezier(.2,1.4,.4,1);
}
.success .ring svg{width:36px;height:36px;stroke:#fff}
@keyframes pop{0%{transform:scale(.4);opacity:0}100%{transform:scale(1);opacity:1}}
.success h4{font-size:21px;font-weight:900;color:var(--navy-900);margin-bottom:10px}
.success p{font-size:14px;color:var(--ink-2);max-width:26em;margin:0 auto 26px}
.success .back{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--blue-600);background:#F0F6FF;border:1px solid #C9DCF8;border-radius:10px;padding:10px 20px}
.success .back:hover{background:#E3EFFE}

/* ===== 10. 页脚 ===== */
.footer{background:var(--navy-900);color:#AEBBD1;padding:42px 0 36px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap}
.footer-brand{flex:0 0 auto}
.footer-brand .brand{display:flex;align-items:center;gap:10px}
.footer-logo{height:44px;width:auto;display:block;background:#fff;border-radius:10px;padding:6px 10px;box-shadow:0 4px 12px rgba(0,0,0,.15)}
.footer-meta{flex:1 1 auto;text-align:center;font-size:13px;line-height:1.7}
.footer-links-row{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:6px;color:#AEBBD1}
.footer-links-row span,.footer-links-row a{color:#AEBBD1;transition:color .2s}
.footer-links-row a:hover{color:#fff}
.footer-links-row span:not(:last-child)::after,.footer-links-row a:not(:last-child)::after{content:"|";margin-left:14px;color:rgba(174,187,209,.4)}
.footer-support{color:#7E8FAA}
.footer-qrcodes{flex:0 0 auto;display:flex;gap:22px}
.qr-item{display:flex;flex-direction:column;align-items:center;gap:6px}
.qr-item img{width:78px;height:78px;border-radius:8px;background:#fff;padding:4px;box-shadow:0 4px 12px rgba(0,0,0,.12)}
.qr-item span{font-size:12px;color:#AEBBD1}

/* ===== 11. 全局提示 ===== */
.toast{
  position:fixed;left:50%;bottom:34px;z-index:100;
  transform:translateX(-50%) translateY(20px);
  background:rgba(10,30,60,.94);color:#fff;
  padding:12px 22px;border-radius:12px;font-size:14px;font-weight:500;
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;max-width:88vw;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== 12. 右侧悬浮联系方式（跟随滚动） ===== */
.side-contact{
  position:fixed;right:16px;top:50%;transform:translateY(-50%);
  z-index:60;
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:8px 7px;box-shadow:var(--shadow-md);
}
.sc-item{position:relative}
.sc-item+.sc-item::before{
  content:"";position:absolute;left:6px;right:6px;top:0;height:1px;
  background:var(--line);opacity:.8;
}
.sc-btn{
  width:58px;padding:11px 2px;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  background:none;border:none;border-radius:11px;
  color:var(--ink-2);
  transition:background .2s ease,color .2s ease;
}
.sc-btn:hover,.sc-item:hover .sc-btn,.sc-item:focus-within .sc-btn{background:#F0F6FF;color:var(--blue-600)}
.sc-ico{display:flex;align-items:center;justify-content:center}
.sc-ico svg{width:22px;height:22px;stroke:currentColor}
.sc-txt{font-size:12.5px;line-height:1.15;font-weight:600;letter-spacing:.5px;text-align:center}

/* 悬浮二维码弹层 */
.sc-pop{
  position:absolute;right:calc(100% + 12px);top:50%;
  width:172px;padding:12px 12px 10px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-lg);text-align:center;
  opacity:0;visibility:hidden;pointer-events:none;
  transform:translateY(-50%) translateX(8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.sc-pop::after{
  content:"";position:absolute;left:100%;top:50%;
  margin-top:-6px;border:6px solid transparent;
  border-left-color:#fff;
}
.sc-pop img{width:146px;height:146px;object-fit:contain;border-radius:8px;margin:0 auto 8px;background:#fff}
.sc-pop span{display:block;font-size:12px;color:var(--ink-3);line-height:1.4;white-space:nowrap}
.sc-item:hover .sc-pop,.sc-item:focus-within .sc-pop{
  opacity:1;visibility:visible;pointer-events:auto;
  transform:translateY(-50%) translateX(0);
}

/* ===== 13. 响应式 ===== */
@media (max-width:1440px){
  .side-contact{right:8px}
}
/* 视口较窄时正文会与悬浮栏重叠，直接收起 */
@media (max-width:1360px){
  .side-contact{display:none}
}
@media (max-width:1024px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .trial-grid{grid-template-columns:1fr;gap:48px}
  .hero-inner{grid-template-columns:1fr;gap:44px;padding:56px 24px 40px}
  .hero-img img{height:300px}
}
@media (max-width:760px){
  body{font-size:16px}
  .nav,.nav-right .link-login{display:none}
  .menu-btn{display:inline-flex;width:44px;height:44px}
  .mobile-nav.open{display:flex}
  .mobile-nav a{padding:13px 6px}
  .hero-inner{padding:48px 20px 32px}
  .feat-grid{grid-template-columns:1fr}
  .form-card{padding:32px 22px 28px}
  .form-row{grid-template-columns:1fr}
  .chip-1{left:8px}
  .chip-2{right:8px}
  .footer-inner{flex-direction:column;align-items:center;text-align:center;gap:24px}
  .footer-meta{text-align:center;width:100%}
  .footer-links-row{gap:10px 16px}
  .footer-qrcodes{justify-content:center}
  .container{padding:0 18px}
  .feat p,.point span,.form-sub,.agree-row label,.privacy-line,.contact-box div,.form-login,.footer p,.footer-links-row a,.section-head .kicker,.trial-left .kicker{font-size:14px}
  input,textarea{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}