/* ============================================================
   StarFrom — 全站设计系统
   ============================================================ */
:root{
  --bg:#FBFAF6;
  --bg-soft:#F4F1EA;
  --panel:#FFFFFF;
  --panel-2:#F7F4ED;
  --line:#E2DCCB;
  --line-soft:#ECE7D9;
  --text:#16181D;
  --text-2:#3A3F47;
  --muted:#6E6A60;
  --orange:#ff5c00;
  --orange-soft:#FFB07A;
  --gold:#B7791F;
  --green:#12855F;
  --red:#C0392B;
  --blue:#3B82F6;
  --r-sm:10px;
  --r:16px;
  --r-lg:22px;
  --r-xl:28px;
  --shadow:0 24px 60px -24px rgba(14,16,19,.18);
  --max:1240px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  line-height:1.68;
  color:var(--text);
  background:
    radial-gradient(1100px 620px at 88% -12%,rgba(255,122,26,.13),transparent 55%),
    radial-gradient(900px 520px at 4% 8%,rgba(123,166,255,.07),transparent 52%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
::selection{background:rgba(255,122,26,.32);color:#fff}

/* ---------- 布局 ---------- */
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:96px 0;position:relative}
.section--tight{padding:64px 0}
.section--alt{background:linear-gradient(180deg,rgba(14,16,19,.025),transparent 70%)}
.divider{height:1px;background:var(--line-soft);border:0;margin:0}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em;font-weight:800}
h1{font-size:clamp(36px,5.2vw,64px);letter-spacing:-.035em}
h2{font-size:clamp(26px,3.2vw,40px);letter-spacing:-.03em}
h3{font-size:19px}
h4{font-size:16px}
p{margin:0;color:var(--text-2)}
.lead{font-size:clamp(16px,1.5vw,19px);color:var(--text-2);max-width:62ch}
.muted{color:var(--muted)}
.center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}

.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:11.5px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
  color:var(--orange);
}
.kicker::before{content:"";width:22px;height:1px;background:var(--orange);opacity:.7}
.section-head{max-width:720px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto}
.section-head h2{margin:14px 0 14px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border-radius:12px;font-weight:800;font-size:14.5px;
  border:1px solid var(--line);background:var(--panel-2);color:var(--text);
  cursor:pointer;transition:.18s ease;white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);border-color:#c5bda9;background:#efece4}
.btn--primary{background:linear-gradient(135deg,var(--orange),#ff6314);border-color:transparent;color:#160d04;box-shadow:0 12px 30px -14px rgba(255,122,26,.75)}
.btn--primary:hover{background:linear-gradient(135deg,#ff8c3a,#ff6d1f);border-color:transparent;box-shadow:0 16px 36px -14px rgba(255,122,26,.9)}
.btn--ghost{background:transparent}
.btn--lg{padding:15px 26px;font-size:16px;border-radius:14px}
.btn--block{width:100%}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,250,246,.82);
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid transparent;transition:.25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line-soft);background:rgba(251,250,246,.94)}
.nav{display:flex;align-items:center;gap:20px;height:68px}
.nav__back{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:999px;
  font-size:13px;font-weight:600;line-height:1;
  color:var(--text);background:rgba(14,16,19,.06);
  border:1px solid rgba(14,16,19,.08);
  text-decoration:none;flex-shrink:0;
  transition:background .15s ease,border-color .15s ease,transform .15s ease;
}
.nav__back:hover{background:rgba(255,122,26,.14);border-color:rgba(255,122,26,.45);transform:translateX(-2px)}
.nav__back-icon{font-size:14px;line-height:1}
@media (max-width:640px){.nav__back-text{display:none}.nav__back{padding:6px 9px}}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.02em;font-size:17px;flex-shrink:0}
.brand__mark{
  width:30px;height:30px;border-radius:9px;flex:0 0 30px;
  background:linear-gradient(135deg,var(--orange),#ff5c0a);
  display:grid;place-items:center;color:#160d04;font-weight:900;font-size:15px;
  box-shadow:0 6px 18px -8px rgba(255,122,26,.9);
}
.brand b{color:var(--orange)}
.nav__links{display:flex;align-items:center;gap:4px;margin-right:auto}
.nav__links a{
  padding:8px 13px;border-radius:10px;font-size:14.5px;font-weight:600;color:var(--muted);transition:.16s ease;
}
.nav__links a:hover{color:var(--text);background:rgba(14,16,19,.05)}
.nav__links a.is-active{color:var(--text);background:rgba(255,122,26,.12)}
.nav__cta{margin-left:8px}
.nav__toggle{
  display:none;margin-left:auto;width:42px;height:38px;border-radius:11px;
  border:1px solid var(--line);background:var(--panel-2);cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4.5px;
}
.nav__toggle span{display:block;width:17px;height:1.6px;background:var(--text);border-radius:2px;transition:.2s ease}
.nav__toggle.is-open span:nth-child(1){transform:translateY(6.1px) rotate(45deg)}
.nav__toggle.is-open span:nth-child(2){opacity:0}
.nav__toggle.is-open span:nth-child(3){transform:translateY(-6.1px) rotate(-45deg)}
.nav__mobile{display:none}

/* ---------- Hero ---------- */
.hero{padding:88px 0 76px;position:relative;overflow:hidden}
.hero__grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.hero h1{margin:18px 0 20px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero__actions{margin-top:32px}
.hero__stats{display:flex;gap:34px;margin-top:44px;flex-wrap:wrap}
.stat__num{font-size:28px;font-weight:900;letter-spacing:-.03em;color:#fff}
.stat__num span{color:var(--orange)}
.stat__label{font-size:12.5px;color:var(--muted);margin-top:2px}

.pill-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:26px}
.pill{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;
  padding:7px 13px;border-radius:999px;border:1px solid var(--line);
  background:rgba(14,16,19,.03);color:var(--text-2);
}
.pill::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--green)}

.flow-card{
  border:1px solid var(--line);border-radius:var(--r-xl);
  background:linear-gradient(160deg,var(--panel),var(--bg-soft));
  padding:24px;box-shadow:var(--shadow);
}
.flow-card__head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.flow-card__title{font-size:13px;font-weight:800;letter-spacing:.02em}
.flow-step{
  display:flex;gap:14px;align-items:flex-start;padding:13px 14px;border-radius:14px;
  border:1px solid transparent;transition:.2s ease;position:relative;
}
.flow-step + .flow-step{margin-top:6px}
.flow-step:hover{background:rgba(14,16,19,.03);border-color:var(--line-soft)}
.flow-step__no{
  width:30px;height:30px;flex:0 0 30px;border-radius:9px;display:grid;place-items:center;
  font-size:13px;font-weight:900;background:rgba(255,122,26,.14);color:var(--orange);
  border:1px solid rgba(255,122,26,.28);
}
.flow-step__b{font-size:14.5px;font-weight:700}
.flow-step__s{font-size:12.5px;color:var(--muted);margin-top:1px}
.flow-step__meta{font-size:11px;color:var(--muted);margin-left:auto;padding-top:6px;white-space:nowrap}

/* ---------- 卡片 ---------- */
.grid{display:grid;gap:16px}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--lg{gap:22px}

/*
 * 栅格子项默认 min-width:auto，等于其 min-content 宽度。
 * 卡片里若含带 min-width 的 <table>（见下方 table 规则与页面内联 min-width），
 * 单列栅格的 1fr 轨道会被撑到比容器更宽，进而导致**整页横向滚动**、
 * 并把 position:fixed 的悬浮按钮推到视口外。
 * 显式允许收缩，让内部 .table-wrap 自己横向滚动。
 */
.grid > *,
.price-grid > *,
.steps > *{min-width:0}

.card{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));
  padding:24px;transition:.22s ease;
}
.card--hover:hover{transform:translateY(-4px);border-color:#c5bda9;box-shadow:var(--shadow)}
.card__icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(255,122,26,.1);border:1px solid rgba(255,122,26,.24);color:var(--orange);
}
.card h3{margin-bottom:8px}
.card p{font-size:14.5px;color:var(--muted)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border-radius:999px;border:1px solid var(--line);
  background:var(--panel-2);color:var(--text-2);font-size:11.5px;font-weight:700;
}
.badge--orange{background:rgba(255,122,26,.12);color:#ffc18b;border-color:rgba(255,122,26,.3)}
.badge--green{background:rgba(79,209,161,.1);color:#8fe6c6;border-color:rgba(79,209,161,.28)}
.badge--blue{background:rgba(123,166,255,.1);color:#a9c4ff;border-color:rgba(123,166,255,.28)}
.badge--gold{background:rgba(233,189,115,.1);color:#f0d19b;border-color:rgba(233,189,115,.3)}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
.step{
  border:1px solid var(--line);border-radius:var(--r);padding:18px 16px;
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));position:relative;overflow:hidden;
}
.step__no{
  font-size:11px;font-weight:900;letter-spacing:.1em;color:var(--orange);margin-bottom:8px;
}
.step__t{font-size:15px;font-weight:800;margin-bottom:5px}
.step__d{font-size:13px;color:var(--muted);line-height:1.55}
.step__tag{margin-top:12px;font-size:11px;color:var(--muted)}

/* ---------- 表格 ---------- */
.table-wrap{overflow:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--r)}
table{width:100%;border-collapse:collapse;min-width:640px;background:var(--bg-soft)}
th,td{padding:13px 15px;text-align:left;border-bottom:1px solid var(--line-soft);font-size:14px}
th{font-size:12px;font-weight:800;color:var(--muted);background:var(--panel-2);text-transform:uppercase;letter-spacing:.04em}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:rgba(14,16,19,.02)}
td strong{color:#fff}

/* ---------- 价格卡 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;align-items:start}
.price-card{
  border:1px solid var(--line);border-radius:var(--r-xl);padding:28px 26px;
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));position:relative;
}
.price-card--hot{
  border-color:rgba(255,122,26,.42);
  background:linear-gradient(180deg,rgba(255,122,26,.08),var(--bg-soft));
  box-shadow:0 30px 70px -40px rgba(255,122,26,.6);
}
.price-card__ribbon{
  position:absolute;top:-11px;left:26px;
  padding:4px 11px;border-radius:999px;font-size:11px;font-weight:800;
  background:var(--orange);color:#160d04;
}
.price-card__name{font-size:15px;font-weight:800;margin-bottom:6px}
.price-card__desc{font-size:13.5px;color:var(--muted);min-height:42px}
.price-card__amount{display:flex;align-items:baseline;gap:6px;margin:18px 0 4px}
.price-card__cur{font-size:20px;font-weight:800;color:var(--orange)}
.price-card__num{font-size:38px;font-weight:900;letter-spacing:-.04em;line-height:1}
.price-card__unit{font-size:13px;color:var(--muted)}
.price-card__note{font-size:12.5px;color:var(--muted);margin-bottom:18px}
.price-list{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:10px}
.price-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);align-items:flex-start}
.price-list li::before{
  content:"";flex:0 0 16px;width:16px;height:16px;margin-top:4px;border-radius:50%;
  background-color:rgba(79,209,161,.14);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234fd1a1' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  background-size:9px 9px;background-position:center;background-repeat:no-repeat;
  box-shadow:inset 0 0 0 1px rgba(79,209,161,.35);
}
.price-list li.off{color:var(--muted);opacity:.55}
.price-list li.off::before{background-color:rgba(151,161,176,.14);box-shadow:inset 0 0 0 1px rgba(151,161,176,.3);background-image:none}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:10px;max-width:820px}
.faq__item{border:1px solid var(--line);border-radius:var(--r);background:var(--bg-soft);overflow:hidden}
.faq__q{
  width:100%;display:flex;align-items:center;gap:14px;justify-content:space-between;
  padding:17px 20px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:15.5px;font-weight:700;color:var(--text);
}
.faq__q:hover{background:rgba(14,16,19,.02)}
.faq__icon{flex:0 0 22px;width:22px;height:22px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--orange);font-size:13px;transition:.2s ease}
.faq__item.is-open .faq__icon{transform:rotate(45deg);background:rgba(255,122,26,.14);border-color:rgba(255,122,26,.4)}
.faq__a{display:none;padding:0 20px 18px;font-size:14.5px;color:var(--muted)}
.faq__item.is-open .faq__a{display:block}

/* ---------- CTA ---------- */
.cta{
  border:1px solid rgba(255,122,26,.3);border-radius:var(--r-xl);
  background:
    radial-gradient(700px 300px at 90% 0%,rgba(255,122,26,.18),transparent 60%),
    linear-gradient(150deg,#1a1208,var(--bg-soft));
  padding:52px 44px;
}
.cta h2{margin-bottom:14px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line-soft);padding:56px 0 32px;margin-top:40px;background:rgba(0,0,0,.25)}
.footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:40px}
.footer-col h4{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:var(--text-2);padding:5px 0}
.footer-col a:hover{color:var(--orange)}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:960px){
  .section{padding:72px 0}
  .hero{padding:56px 0 48px}
  .hero__grid{grid-template-columns:1fr;gap:40px}
  .g-3,.g-4,.price-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nav__links,.nav__cta{display:none}
  .nav__toggle{display:flex}
  .nav__mobile{
    display:block;position:fixed;top:68px;left:0;right:0;z-index:99;
    background:rgba(251,250,246,.98);backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);padding:14px 24px 22px;
    max-height:calc(100vh - 68px);overflow:auto;
  }
  .nav__mobile[hidden]{display:none}
  .nav__mobile a{display:block;padding:13px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line-soft);color:var(--text-2)}
  .nav__mobile a.is-active{color:var(--orange)}
  .nav__mobile .btn{margin-top:16px;width:100%}
}
@media (max-width:720px){
  .wrap{padding:0 18px}
  .g-2,.g-3,.g-4,.price-grid,.steps{grid-template-columns:1fr}
  .cta{padding:34px 22px}
  .hero__stats{gap:24px}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:60px 0}
  /* 手机上把表格最小宽度下限调低；仍由 .table-wrap 内部横向滚动，
     避免 640px 下限在 300px 出头的可视宽度里需要滑动两屏。
     页面内联 min-width（如 560px / 420px）优先级更高，保持原样。 */
  table{min-width:520px}
  th,td{padding:11px 12px;font-size:13.5px}
  .card{padding:20px}
  /* 单列断点下 grid-column:span N 会造出宽度为 0 的隐式轨道，直接取消跨列 */
  .g-2 > [style*="grid-column"],
  .g-3 > [style*="grid-column"],
  .g-4 > [style*="grid-column"]{grid-column:auto}
}