/* ============================================================
   爱思助手官网 · 全站共享样式
   紫粉双色调 + 玻璃层次 / 衬线标题 + 无衬线正文 / 数字艺术气质
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  --purple:#7c5cfc;
  --purple-deep:#3f2685;
  --purple-mid:#5b3fc0;
  --purple-soft:#cdbcff;
  --pink:#f56bb0;
  --pink-deep:#d94f95;
  --pink-soft:#ffc9e0;
  --ink:#1d1735;
  --ink-2:#4a4468;
  --ink-3:#78739a;
  --paper:#f8f5ff;
  --glass:rgba(255,255,255,.60);
  --glass-2:rgba(255,255,255,.86);
  --line:rgba(124,92,252,.18);
  --line-2:rgba(124,92,252,.34);
  --radius-s:12px;
  --radius:18px;
  --radius-l:26px;
  --shadow-s:0 8px 22px -14px rgba(63,38,133,.35);
  --shadow:0 26px 60px -32px rgba(63,38,133,.45);
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --maxw:1160px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:clamp(.98rem,.4vw + .88rem,1.05rem);
  line-height:1.78;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(1100px 620px at 8% -8%,rgba(124,92,252,.20),transparent 68%),
    radial-gradient(900px 520px at 96% 6%,rgba(245,107,176,.18),transparent 70%),
    radial-gradient(800px 700px at 50% 108%,rgba(124,92,252,.12),transparent 72%);
  background-attachment:fixed;
}
img{max-width:100%}
a{color:var(--purple-mid);text-decoration-color:rgba(124,92,252,.4)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.28;text-wrap:balance;margin:0;color:var(--ink)}
p{margin:0}
:focus-visible{outline:2px solid var(--pink-deep);outline-offset:3px;border-radius:8px}

/* ---------- 容器与跳转链接 ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.skip-link{
  position:absolute;left:0;top:-120px;z-index:100;
  background:#fff;color:var(--purple-deep);font-weight:600;
  padding:.6rem 1rem;border-radius:0 0 12px 0;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(120deg,rgba(255,255,255,.84),rgba(255,255,255,.66));
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.header-inner{
  display:flex;align-items:center;flex-wrap:wrap;gap:.5rem 1rem;
  max-width:var(--maxw);margin-inline:auto;padding:.7rem var(--gutter);
}
.brand{
  display:flex;align-items:center;gap:.65rem;flex:none;
  text-decoration:none;color:var(--purple-deep);
  font-family:var(--serif);font-weight:700;font-size:1.05rem;
}
.brand img{width:44px;height:44px;object-fit:contain;flex:none}
.brand-name{display:flex;flex-direction:column;line-height:1.12}
.brand-sub{
  font-family:var(--sans);font-size:.7rem;font-weight:500;
  letter-spacing:.14em;color:var(--ink-3);
}
.nav{display:flex;flex-wrap:wrap;gap:.2rem;margin-left:auto}
.nav a{
  padding:.45rem .85rem;border-radius:999px;text-decoration:none;
  color:var(--ink-2);font-size:.95rem;font-weight:500;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.nav a:hover{background:rgba(124,92,252,.12);color:var(--purple-deep)}
.nav a[aria-current="page"]{
  background:linear-gradient(120deg,rgba(124,92,252,.18),rgba(245,107,176,.18));
  color:var(--purple-deep);font-weight:700;
}
.header-download{margin-left:.5rem;flex:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  padding:.72rem 1.4rem;border-radius:999px;
  font-family:var(--sans);font-weight:600;font-size:.95rem;line-height:1.2;
  text-decoration:none;border:1px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),
             background-color .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.btn-primary{
  color:#fff;
  background:linear-gradient(115deg,#6d4aff 0%,#8d5cf9 45%,#f56bb0 100%);
  box-shadow:0 12px 28px -14px rgba(109,74,255,.75);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px -14px rgba(245,107,176,.7);color:#fff}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{color:var(--purple-deep);background:var(--glass);border-color:var(--line-2)}
.btn-ghost:hover{background:rgba(124,92,252,.14);color:var(--purple-deep)}
.btn-sm{padding:.5rem 1rem;font-size:.88rem}

/* ---------- 小标签 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-size:.76rem;letter-spacing:.08em;font-weight:600;
  color:var(--purple-deep);background:rgba(124,92,252,.10);
  border:1px solid var(--line-2);border-radius:999px;
  padding:.28rem .85rem;margin-bottom:.9rem;
}
.eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;flex:none;
  background:linear-gradient(135deg,var(--purple),var(--pink));
}
.lead{color:var(--ink-2);font-size:clamp(1rem,.5vw + .94rem,1.1rem);max-width:60ch}

/* ---------- 首屏 ---------- */
.hero{padding-block:clamp(1.8rem,4vw,3.4rem)}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:clamp(1.4rem,4vw,3rem);
  align-items:center;
}
.hero-title{font-size:clamp(1.9rem,4.4vw,3.1rem);letter-spacing:-.01em;margin-bottom:.9rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.4rem}
.hero-facts{list-style:none;display:flex;flex-wrap:wrap;gap:.5rem;padding:0;margin:1.3rem 0 0}
.hero-facts li{
  font-size:.85rem;color:var(--purple-deep);
  background:var(--glass);border:1px solid var(--line);
  border-radius:999px;padding:.35rem .85rem;
}
.hero-art-wrap{
  background:linear-gradient(155deg,rgba(124,92,252,.12),rgba(245,107,176,.10)),var(--glass);
  border:1px solid var(--line);border-radius:var(--radius-l);
  padding:clamp(.6rem,1.6vw,1.2rem);box-shadow:var(--shadow);
}

/* ---------- 区块 ---------- */
.section{padding-block:clamp(2.2rem,5vw,4rem)}
.section-head{max-width:68ch;margin-bottom:clamp(1.2rem,2.6vw,2rem)}
.section-head h2{font-size:clamp(1.45rem,2.6vw,2.1rem)}
.section-head .lead{margin-top:.7rem}
.band{
  background:linear-gradient(180deg,rgba(124,92,252,.06),rgba(245,107,176,.05));
  border-block:1px solid var(--line);
}

/* ---------- 栅格 ---------- */
.grid{display:grid;gap:clamp(.9rem,2vw,1.4rem)}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}

/* ---------- 卡片 ---------- */
.card{
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--radius);padding:clamp(1rem,1.6vw,1.4rem);
  box-shadow:var(--shadow-s);backdrop-filter:blur(10px);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),transform .3s var(--ease);
}
.card:hover{border-color:var(--line-2);box-shadow:var(--shadow);transform:translateY(-3px)}
.card h3{font-size:1.1rem;margin-bottom:.5rem}
.card p{color:var(--ink-2);font-size:.95rem}
.feature-no{
  display:block;font-family:var(--serif);font-size:.82rem;
  letter-spacing:.12em;color:var(--pink-deep);margin-bottom:.5rem;
}

/* ---------- 时间线 ---------- */
.timeline{position:relative;display:grid;gap:1.5rem;padding-left:2.4rem;margin:1.2rem 0 0}
.timeline::before{
  content:"";position:absolute;left:calc(.9rem + 5px);top:.6rem;bottom:.6rem;
  width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--purple),var(--pink));
}
.tl-item{position:relative}
.tl-item::before{
  content:"";position:absolute;left:-1.5rem;top:.5rem;
  width:12px;height:12px;border-radius:50%;
  background:linear-gradient(135deg,var(--purple),var(--pink));
  box-shadow:0 0 0 4px rgba(124,92,252,.12);
}
.tl-item h3{font-size:1.02rem;margin-bottom:.25rem}
.tl-item p{color:var(--ink-2);font-size:.95rem}

/* ---------- 场景 ---------- */
.scenario{
  position:relative;background:var(--glass);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-s);
  padding:clamp(1rem,1.8vw,1.5rem) clamp(1rem,1.8vw,1.5rem) clamp(1rem,1.8vw,1.5rem) calc(clamp(1rem,1.8vw,1.5rem) + .7rem);
}
.scenario::before{
  content:"";position:absolute;left:0;top:1rem;bottom:1rem;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--purple),var(--pink));
}
.scenario h3{font-size:1.1rem;margin-bottom:.45rem}
.steps{margin:.7rem 0 0;padding-left:1.25rem;display:grid;gap:.4rem;color:var(--ink-2);font-size:.95rem}
.steps li::marker{color:var(--purple-mid);font-weight:700}

/* ---------- 快速上手 ---------- */
.quickstart{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);
  gap:1.2rem;align-items:center;
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--radius);padding:clamp(1rem,2vw,1.5rem);
  box-shadow:var(--shadow-s);margin-top:clamp(1.2rem,3vw,2rem);
}
.quickstart h3{font-size:1.1rem;margin-bottom:.5rem}

/* ---------- 表格 ---------- */
.table-wrap{
  overflow-x:auto;-webkit-overflow-scrolling:touch;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--glass-2);box-shadow:var(--shadow-s);
}
table{width:100%;border-collapse:collapse;min-width:560px;font-size:.94rem}
thead th{
  background:linear-gradient(120deg,rgba(124,92,252,.16),rgba(245,107,176,.13));
  font-family:var(--serif);font-weight:700;color:var(--purple-deep);
  padding:.85rem 1rem;text-align:left;border-bottom:1px solid var(--line-2);
}
tbody td{padding:.85rem 1rem;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(124,92,252,.05)}

/* ---------- 清单 ---------- */
.checklist{list-style:none;padding:0;margin:1rem 0 0;display:grid;gap:.7rem}
.checklist li{position:relative;padding-left:1.6rem;color:var(--ink-2);font-size:.95rem}
.checklist li::before{
  content:"";position:absolute;left:0;top:.6rem;
  width:10px;height:10px;border-radius:50%;
  background:linear-gradient(135deg,var(--purple),var(--pink));
}

/* ---------- 事实信息 ---------- */
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.8rem;margin-top:1rem}
.fact{
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--radius-s);padding:.9rem 1rem;
}
.fact-label{display:block;font-size:.78rem;letter-spacing:.1em;color:var(--ink-3);margin-bottom:.25rem}
.fact-value{
  font-family:var(--serif);font-size:1rem;font-weight:700;
  color:var(--purple-deep);word-break:break-word;
}

/* ---------- 下载面板 ---------- */
.download-panel{
  display:grid;gap:1rem;
  padding:clamp(1.2rem,2.6vw,2rem);
  border-radius:var(--radius-l);border:1px solid var(--line-2);
  background:linear-gradient(140deg,rgba(124,92,252,.14),rgba(245,107,176,.12)),var(--glass-2);
  box-shadow:var(--shadow);
}
.download-panel .lead{max-width:58ch}
.download-actions{display:flex;flex-wrap:wrap;gap:.7rem}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:.6rem;margin-top:1rem}
.faq details{
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--radius-s);padding:0 clamp(.6rem,1.2vw,.9rem);
  transition:background-color .25s var(--ease),border-color .25s var(--ease);
}
.faq details[open]{background:rgba(124,92,252,.09);border-color:var(--line-2)}
.faq summary{
  cursor:pointer;list-style:none;position:relative;
  padding:.85rem .2rem .85rem 1.7rem;
  font-family:var(--sans);font-weight:600;color:var(--ink);
  border-radius:var(--radius-s);
  transition:color .2s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{
  content:"＋";position:absolute;left:.15rem;top:.78rem;
  font-size:1rem;font-weight:700;color:var(--purple-deep);
}
.faq details[open] summary::before{content:"－"}
.faq summary:hover{color:var(--purple-deep)}
.faq p{margin:0 .2rem .95rem 1.7rem;color:var(--ink-2);font-size:.95rem}

/* ---------- 最新动态 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:clamp(.9rem,2vw,1.3rem)}
.news-card{
  display:flex;flex-direction:column;gap:.6rem;
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--radius);padding:clamp(1rem,1.6vw,1.3rem);
  box-shadow:var(--shadow-s);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.news-card:hover{border-color:var(--line-2);box-shadow:var(--shadow)}
.news-date{font-size:.8rem;letter-spacing:.08em;font-weight:600;color:var(--pink-deep)}
.news-card h3{font-size:1.05rem}
.news-card p{color:var(--ink-2);font-size:.93rem;flex:1}
.news-card .btn{align-self:flex-start}

/* ---------- 相关阅读 ---------- */
.related{list-style:none;padding:0;margin:1rem 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:.8rem}
.related li{background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-s);padding:.9rem 1rem}
.related a{
  display:inline-block;font-family:var(--serif);font-weight:700;
  color:var(--purple-deep);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.related a:hover{border-color:var(--pink);color:var(--purple-deep)}
.related p{margin-top:.25rem;font-size:.9rem;color:var(--ink-2)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(2rem,5vw,4rem);
  background:linear-gradient(135deg,#2a1c52,#3f2685 45%,#6a3f8f);
  color:#efeaff;padding-block:clamp(1.8rem,4vw,2.6rem);
}
.footer-grid{
  display:grid;grid-template-columns:1.2fr .8fr .8fr;
  gap:clamp(1rem,3vw,2rem);align-items:start;
}
.footer-brand{display:flex;gap:.8rem;align-items:flex-start}
.footer-brand img{width:48px;height:48px;object-fit:contain;flex:none}
.footer-name{font-family:var(--serif);font-size:1.1rem;font-weight:700;color:#fff;margin-bottom:.3rem}
.footer-name span{font-family:var(--sans);font-size:.78rem;font-weight:500;letter-spacing:.12em;color:rgba(239,234,255,.7)}
.footer-note{font-size:.9rem;color:rgba(239,234,255,.75);max-width:38ch}
.footer-nav{display:grid;gap:.5rem}
.footer-nav a{color:rgba(239,234,255,.85);text-decoration:none;font-size:.95rem;transition:color .2s var(--ease)}
.footer-nav a:hover{color:#fff}
.footer-nav a[aria-current="page"]{color:#fff;font-weight:700}
.footer-meta{display:grid;gap:.8rem;justify-items:start}
.copyright{font-size:.85rem;color:rgba(239,234,255,.6)}

/* ---------- SVG 图形尺寸 ---------- */
svg{max-width:100%}
.hero-art{display:block;width:100%;height:auto;max-width:520px;margin-inline:auto}
.flow-art{display:block;width:100%;height:auto;max-width:640px;margin-inline:auto}
.wave-art{display:block;width:100%;height:auto;max-width:220px;margin:.7rem 0 0}

/* ---------- SVG 动效 ---------- */
@keyframes orbitBreathe{
  0%,100%{transform:scale(1);opacity:.72}
  50%{transform:scale(1.1);opacity:.4}
}
@keyframes nodePulse{
  0%,100%{transform:scale(1);opacity:1}
  50%{transform:scale(1.22);opacity:.6}
}
@keyframes drawStroke{
  0%{stroke-dashoffset:1}
  62%,100%{stroke-dashoffset:0}
}
@keyframes barBreathe{
  0%,100%{transform:scaleY(1)}
  50%{transform:scaleY(.55)}
}

.ring{transform-box:fill-box;transform-origin:center;animation:orbitBreathe 9s var(--ease) infinite}
.ring-a{animation-duration:7s}
.ring-b{animation-duration:9.5s;animation-delay:-1.8s}
.ring-c{animation-duration:12s;animation-delay:-3.5s}
.ring-d{animation-duration:15s;animation-delay:-5s}

.node{transform-box:fill-box;transform-origin:center;animation:nodePulse 6s var(--ease) infinite}
.node-2{animation-delay:-1.2s}
.node-3{animation-delay:-2.4s}
.node-4{animation-delay:-3.6s}
.node-5{animation-delay:-4.8s}

.draw{stroke-dasharray:1;stroke-dashoffset:0;animation:drawStroke 9s var(--ease) infinite}
.draw-b{animation-delay:-4s}

.bar{transform-box:fill-box;transform-origin:center;animation:barBreathe 5.5s var(--ease) infinite}
.bar-2{animation-delay:-1s}
.bar-3{animation-delay:-2s}
.bar-4{animation-delay:-3s}
.bar-5{animation-delay:-4s}
.bar-6{animation-delay:-1.5s}
.bar-7{animation-delay:-2.5s}
.bar-8{animation-delay:-3.5s}
.bar-9{animation-delay:-4.5s}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .hero-art{max-width:420px}
}
@media (max-width:820px){
  .quickstart{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .header-inner{gap:.5rem .7rem}
  .nav{order:3;width:100%;justify-content:flex-start;margin-left:0}
  .header-download{margin-left:auto}
}
@media (max-width:560px){
  .hero{padding-block:1.4rem}
  .hero-title{font-size:clamp(1.6rem,7vw,2rem)}
  .btn{padding:.68rem 1.15rem}
  .section{padding-block:2rem}
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .ring,.node,.draw,.bar{animation:none}
  .card,.news-card,.btn,.nav a,.faq details,.faq summary,.skip-link{transition:none}
}