/* ====== RONGYAO AI · SHARED DESIGN SYSTEM v4 ====== */
:root {
  --g-deep: #0F2B0F; --g-main: #1F4F1F; --g-mid: #3A7035;
  --g-light: #6B9E5A; --g-pale: #C5DFBB; --g-bg: #EDF5E8;
  --gold: #C4922E; --gold-bright: #E2B44C; --gold-pale: #FBF2DD;
  --warm: #FAF7F2; --white: #FFFFFF; --ink: #1A1A1A;
  --gray: #6B6B6B; --gray-light: #A0A0A0; --border: #E8E8E8;
  --shadow-card: 0 2px 20px rgba(0,0,0,0.06); --shadow-hover: 0 20px 56px rgba(0,0,0,0.10);
  --ease-out: cubic-bezier(0.16,1,0.3,1);
  --ease-spring: cubic-bezier(0.34,1.56,0.64,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--white);line-height:1.6;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;
  animation:fadeIn 0.6s var(--ease-out);
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,0.82);backdrop-filter:saturate(180%) blur(24px);
  -webkit-backdrop-filter:saturate(180%) blur(24px);
  border-bottom:1px solid rgba(0,0,0,0.04);transition:box-shadow 0.4s;
}
.nav-inner{max-width:1240px;margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;height:56px}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:1.1rem;color:var(--g-deep);letter-spacing:-0.02em}
.nav-logo .mark{width:36px;height:36px;background:linear-gradient(135deg,var(--g-main),var(--g-mid));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:700}
.nav-links{display:flex;gap:0;list-style:none;align-items:center}
.nav-links>li{position:relative}
.nav-links>li>a{text-decoration:none;color:var(--gray);font-size:0.84rem;font-weight:550;padding:8px 16px;border-radius:8px;transition:all 0.2s;letter-spacing:0.02em;display:flex;align-items:center;gap:4px;cursor:pointer}
.nav-links>li>a:hover,.nav-links>li>a.active{color:var(--g-main);background:var(--g-bg)}
.nav-links>li>a .arr{font-size:0.6rem;opacity:0.4;transition:transform 0.2s}
.nav-links>li.open>a .arr{transform:rotate(180deg);opacity:0.8}
.nav-links .dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%);background:rgba(255,255,255,0.97);backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);border-radius:16px;box-shadow:0 16px 48px rgba(0,0,0,0.10);border:1px solid var(--border);padding:8px;min-width:180px;opacity:0;visibility:hidden;pointer-events:none;z-index:100;transition:opacity 0.15s,visibility 0.15s;margin-top:0}
.nav-links>li.open .dropdown{opacity:1;visibility:visible;pointer-events:auto}
.dropdown a{display:block;padding:10px 16px;border-radius:10px;font-size:0.84rem;color:var(--gray);text-decoration:none;font-weight:500;transition:all 0.15s;white-space:nowrap}
.dropdown a:hover{background:var(--g-bg);color:var(--g-main);font-weight:600}
.dropdown .dd-title{font-size:0.7rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--gray-light);padding:8px 16px 4px;font-weight:700}
.nav-cta{display:flex;gap:8px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;border-radius:24px;font-size:0.85rem;font-weight:650;text-decoration:none;letter-spacing:0.02em;transition:all 0.3s cubic-bezier(0.25,0.1,0.25,1);cursor:pointer;border:none;white-space:nowrap}
.btn-fill{background:var(--g-main);color:#fff}.btn-fill:hover{background:var(--g-deep);transform:translateY(-2px);box-shadow:0 12px 32px rgba(31,79,31,0.35);transition:all 0.35s var(--ease-out)}
.btn-ghost{background:transparent;color:var(--g-main);border:1.5px solid var(--g-main)}.btn-ghost:hover{background:var(--g-bg);transform:translateY(-2px);transition:all 0.35s var(--ease-out)}
.btn-gold{background:var(--gold);color:#fff;font-weight:700}.btn-gold:hover{background:#A87A20;transform:translateY(-2px);box-shadow:0 12px 32px rgba(196,146,46,0.40);transition:all 0.35s var(--ease-out)}
.btn-lg{padding:14px 36px;font-size:1rem;border-radius:28px}
.btn-xl{padding:16px 44px;font-size:1.1rem;border-radius:30px}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}
.hamburger span{display:block;width:24px;height:2px;background:var(--ink);border-radius:2px;transition:all 0.3s}
@media(max-width:1024px){.nav-links>li>a{font-size:0.78rem;padding:6px 10px}.btn{padding:8px 16px;font-size:0.8rem}}
@media(max-width:860px){
  .nav-links,.nav-cta .btn-ghost{display:none}.hamburger{display:flex}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:56px;left:0;right:0;background:rgba(255,255,255,0.97);backdrop-filter:blur(24px);padding:16px 28px;border-bottom:1px solid var(--border);box-shadow:0 20px 60px rgba(0,0,0,0.08);gap:0;max-height:80vh;overflow-y:auto}
  .nav-links.open li{position:static}
  .nav-links.open>li>a{padding:14px 8px;font-size:0.95rem;border-bottom:1px solid var(--border);border-radius:0;width:100%}
  .nav-links.open>li>a:last-child{border-bottom:none}
  .nav-links.open .dropdown{position:static;transform:none;opacity:1;visibility:visible;pointer-events:auto;box-shadow:none;border:none;background:transparent;padding:0 0 8px 0;display:block}
  .nav-links.open .dropdown a{padding:8px 20px;font-size:0.85rem;border-bottom:none;color:var(--gray)}
}

/* SECTION BASE */
section{padding:96px 28px;position:relative;overflow:hidden}
.inner{max-width:1120px;margin:0 auto;position:relative;z-index:1}
.eyebrow{font-size:0.78rem;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;color:var(--g-mid);margin-bottom:16px}
.page-title{font-size:3.2rem;font-weight:800;letter-spacing:-0.03em;line-height:1.12;margin-bottom:18px;text-wrap:balance}
.page-subtitle{font-size:1.25rem;color:var(--gray);font-weight:450;line-height:1.7;max-width:640px;margin-bottom:56px;text-wrap:balance}
h1,h2,h3,h4{text-wrap:balance}
/* Mobile typography */
@media(max-width:768px){
  section{padding:52px 16px}
  .page-title{font-size:1.8rem!important;line-height:1.18}
  .page-subtitle{font-size:0.95rem!important;margin-bottom:28px;max-width:100%}
  .eyebrow{font-size:0.7rem;margin-bottom:12px}
  h2{font-size:1.45rem!important}
  h1.page-title{font-size:1.8rem!important}
  .page-hero .inner{gap:24px}
  .illus{aspect-ratio:16/10}.illus-hero{aspect-ratio:16/10}
  /* Hide all ::after arrows on mobile */
  [class*="step"]::after,.fs::after,.stage::after,.as::after,
  [class*="pipeline"] [class*="step"]::after,
  [class*="flow"] [class*="step"]::after{display:none!important}
  /* Collapse common grids to 2 columns */
  [class*="track"],.judge-grid,.hot-jobs,.features2,.gallery,
  .adv2,.pipeline2,.income-timeline,.month-stars,.employer-q,
  .cert-levels2,.cert-samples2,.benefits2,.data-stats2,
  .model-grid2,.apply-steps,.tier2,.case-grid,.team-grid{grid-template-columns:repeat(2,1fr)!important}
  .career-grid{grid-template-columns:repeat(3,1fr)!important}
  .logo-row2{grid-template-columns:repeat(3,1fr)!important}
  .prov-grid2{grid-template-columns:repeat(3,1fr)!important}
  .timeline3,.task-grid,.resource-cards,.opc-model2{grid-template-columns:1fr!important}
  .btn-lg{padding:12px 28px;font-size:0.9rem}.btn-xl{padding:14px 32px;font-size:1rem}
}
@media(max-width:480px){
  [class*="track"],.judge-grid,.hot-jobs,.features2,.gallery,
  .adv2,.pipeline2,.income-timeline,.month-stars,.employer-q,
  .cert-levels2,.cert-samples2,.benefits2,.data-stats2,
  .model-grid2,.apply-steps,.tier2,.case-grid,.team-grid,
  .career-grid,.logo-row2,.prov-grid2{grid-template-columns:1fr!important}
  .page-title{font-size:1.6rem!important}
  h2{font-size:1.3rem!important}
}

/* PAGE HERO */
.page-hero{min-height:45vh;display:flex;align-items:center;padding-top:80px;background:linear-gradient(175deg,#EFF7EA 0%,#F6F3EC 35%,#FFFFFF 100%);position:relative}
.page-hero.dark{background:linear-gradient(170deg,var(--g-deep),var(--g-main));color:#fff}
.page-hero.dark .page-title{color:#fff}.page-hero.dark .page-subtitle{color:rgba(255,255,255,0.65)}.page-hero.dark .eyebrow{color:var(--gold-bright)}
.page-hero .inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
@media(max-width:968px){.page-hero .inner{grid-template-columns:1fr;gap:32px}.page-hero{min-height:auto;padding-bottom:56px}}

/* Breadcrumb */
.breadcrumb{font-size:0.82rem;color:var(--gray-light);margin-bottom:8px}
.breadcrumb a{color:var(--g-mid);text-decoration:none;font-weight:550}.breadcrumb a:hover{text-decoration:underline}

/* CARDS */
.cards2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cards4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:var(--white);border-radius:20px;padding:32px 26px;border:1px solid var(--border);box-shadow:var(--shadow-card);transition:all 0.4s var(--ease-out);text-decoration:none;color:inherit;display:block}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--g-light)}
.card .icon{font-size:36px;margin-bottom:16px;display:block}
.card h3{font-size:1.15rem;font-weight:750;margin-bottom:8px;letter-spacing:-0.01em}
.card p{font-size:0.9rem;color:var(--gray);line-height:1.6}
.card .tag{display:inline-block;margin-top:14px;font-size:0.76rem;padding:5px 14px;border-radius:12px;background:var(--g-bg);color:var(--g-main);font-weight:650}
@media(max-width:768px){.cards2,.cards3,.cards4{grid-template-columns:1fr}.card{padding:22px 18px}.card h3{font-size:1.05rem}}

/* SPLIT */
.split2{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split2 h2{font-size:2.4rem;font-weight:800;letter-spacing:-0.03em;line-height:1.18;margin-bottom:16px;text-wrap:balance}
.split2 p{font-size:1.05rem;color:var(--gray);line-height:1.75;margin-bottom:22px}
@media(max-width:768px){.split2{grid-template-columns:1fr;gap:24px}.split2 h2{font-size:1.45rem;line-height:1.25}}

/* STAT ROW */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-row .s-num{font-size:2.6rem;font-weight:900;color:var(--g-main);letter-spacing:-0.02em;font-family:"SF Pro Display",-apple-system,sans-serif}
.stat-row .s-num.gold{color:var(--gold)}
.stat-row .s-lbl{font-size:0.84rem;color:var(--gray-light);margin-top:4px}
@media(max-width:768px){.stat-row{grid-template-columns:repeat(2,1fr);gap:20px}.stat-row .s-num{font-size:2rem}}

/* FOOTER */
.footer{background:#0E240E;color:rgba(255,255,255,0.6);padding:72px 28px 36px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;max-width:1120px;margin:0 auto}
.footer h5{color:#fff;font-size:0.85rem;font-weight:750;letter-spacing:0.06em;margin-bottom:18px;text-transform:uppercase}
.footer a{color:rgba(255,255,255,0.5);text-decoration:none;font-size:0.84rem;line-height:2.4;transition:color 0.2s}
.footer a:hover{color:var(--gold-bright)}
.gov-links{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:36px;padding-top:28px;border-top:1px solid rgba(255,255,255,0.08);max-width:1120px;margin-left:auto;margin-right:auto}
.gov-links .gl{color:#fff;font-size:0.76rem;font-weight:700;letter-spacing:0.04em;grid-column:span 4;margin-bottom:2px}
.gov-links a{font-size:0.76rem;line-height:2}
.footer-bot{max-width:1120px;margin:32px auto 0;padding-top:24px;border-top:1px solid rgba(255,255,255,0.08);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:0.76rem}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}.gov-links{grid-template-columns:repeat(2,1fr)}.gov-links .gl{grid-column:span 2}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}

/* ====== FORM FOCUS GLOW ====== */
input:focus, textarea:focus, select:focus {
  border-color: var(--g-main) !important;
  box-shadow: 0 0 0 3px rgba(31,79,31,0.08);
  transition: box-shadow 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
/* ====== SMOOTH NAV SHADOW ====== */
.nav { transition: box-shadow 0.5s var(--ease-out); }
/* ====== REVEAL ANIMATION POLISH ====== */
.reveal { transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }