/* Hengyuan visual rebuild v2 — ported CSS (rebuild-20261030).
   Base: liandong sample v2 system via huatao site-v2 structure (references NOT modified).
   Palette: hengyuan's own values, unchanged: ink #1c2733, muted #5a6b7c, paper #f7f5f0,
   navy #16324f, line #d8d2c6; group accents via body --accent (home #16324f,
   category #17706a, application #a66a00, guide #44546e, inquiry #8a3b12).
   Adapter notes (see STEP0-RECORD.md):
   - header rows kept as-is (main 7 + product 8 + guide 19 = 34); mobile scroll rows + fade, no bleed.
   - brandbar button scoped to a.brandcta ONLY (huayue lesson: brand link never picks up button style).
   - H2 alternation via main>section:nth-of-type (keimit lesson: one h2 per section).
   - motif-strip gradient copied VERBATIM (visual signature).
   - hero stays navy (blueprint prototype); evidence cards white on navy.
   - evidence spans kept verbatim, styled as cards; evidence is not a <ul>, so no list-style rule needed.
   - grid children min-width:0 (kangfusi lesson, defensive).
   - no banned comment wording in this file. */
:root{--ink:#1c2733;--muted:#5a6b7c;--paper:#f7f5f0;--navy:#16324f;--line:#d8d2c6;--card:#ffffff;--pale:#dbe6ef}
*{box-sizing:border-box}
body{margin:0;font-family:Georgia,serif;color:var(--ink);background:var(--paper);line-height:1.65}
a{color:#1d5a7a}
/* --- brandbar: full-width navy strip, brand + solid CTA button --- */
.site-header{background:#fff}
.brandbar{background:var(--navy);color:#fff}
.brandrow{max-width:1160px;margin:0 auto;padding:16px 24px 12px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.brandcol{min-width:0}
.brand{font-size:26px;font-weight:700;color:#fff;letter-spacing:.2px}
.brand-small{display:block;font-size:13px;font-weight:400;color:var(--pale);font-family:Arial,sans-serif;letter-spacing:.08em;text-transform:uppercase}
a.brandcta{display:inline-block;background:#fff;color:var(--navy) !important;padding:11px 22px;text-decoration:none;font-family:Arial,Helvetica,sans-serif;font-weight:700;font-size:15px;border-radius:3px}
a.brandcta:hover{background:var(--pale);color:var(--navy)}
/* --- 404 legacy header (no nav, markup unchanged): same navy bar treatment --- */
.header-inner{background:var(--navy);padding:16px 24px 12px}
/* --- nav rows: desktop wrap, mobile scroll rows with fade --- */
.main-nav{max-width:1160px;margin:0 auto;padding:6px 24px 12px;display:flex;flex-wrap:wrap;gap:6px 18px}
.nav-link{font-family:Arial,sans-serif;font-size:14px;text-decoration:none;color:var(--navy);font-weight:700;white-space:nowrap}
.nav-link:hover{text-decoration:underline}
.product-nav{max-width:1160px;margin:0 auto;padding:4px 24px;display:flex;flex-wrap:wrap;gap:6px 14px;border-top:1px solid var(--line)}
.product-link{font-family:Arial,sans-serif;font-size:13px;text-decoration:none;white-space:nowrap}
.guide-nav{max-width:1160px;margin:0 auto;padding:4px 24px 14px;display:flex;flex-wrap:wrap;gap:6px 14px}
.guide-link{font-family:Arial,sans-serif;font-size:13px;text-decoration:none;color:#3d556e;white-space:nowrap}
.motif-strip{height:14px;background:repeating-linear-gradient(90deg,var(--accent) 0 14px,#ffffff 14px 20px,var(--accent) 20px 22px,#ffffff 22px 30px);border-top:3px solid var(--accent);border-bottom:1px solid var(--line)}
/* --- compact hero, navy by prototype; reading measure 880 --- */
.hero{background:var(--navy);color:#fff}
.hero-inner{max-width:880px;margin:0 auto;padding:28px 24px}
.hero-title{font-size:34px;line-height:1.25;margin:0 0 12px}
.hero-lede{font-size:17px;color:#dbe6ef;max-width:860px}
/* --- evidence cards on navy hero --- */
.evidence-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-top:20px;padding-top:16px;border-top:1px solid #3d5a78;font-family:Arial,sans-serif;font-size:13px}
.evidence-item{display:block;background:#fff;color:var(--ink);border:1px solid var(--line);border-top:4px solid var(--accent);padding:12px 16px;font-size:15px;line-height:1.6;min-width:0}
/* --- body --- */
.main-content{max-width:880px;margin:0 auto;padding:8px 24px 40px}
.breadcrumb{font-family:Arial,sans-serif;font-size:13px;color:var(--muted)}
.section{margin:28px 0}
.section-title{font-size:22px;color:var(--navy);border-bottom:2px solid var(--accent);padding-bottom:6px}
main>section:nth-of-type(odd) .section-title{border-left:6px solid var(--accent);padding-left:12px}
main>section:nth-of-type(even) .section-title{background:var(--navy);color:#fff;padding:12px 16px}
.section>p{font-size:17px;line-height:1.85;margin:0 0 1.15em}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.card-grid>*{min-width:0}
.product-card{background:#fff;border:1px solid var(--line);border-left:5px solid var(--accent);padding:16px;min-width:0}
.guide-index-card{background:#fff;border:1px solid var(--line);padding:16px;min-width:0}
.cta-band{background:#fff;border:2px solid var(--accent);padding:22px;margin:34px 0}
.cta-title{font-size:22px;font-weight:700;color:var(--navy);margin:0 0 8px}
.cta-text{margin:0 0 14px}
.cta-button{display:inline-block;background:var(--navy);color:#fff;padding:10px 20px;text-decoration:none;font-family:Arial,sans-serif;font-weight:700;margin-right:10px}
.cta-button-secondary{display:inline-block;border:2px solid var(--navy);color:var(--navy);padding:8px 18px;text-decoration:none;font-family:Arial,sans-serif;font-weight:700}
.source-note{font-size:14px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}
.site-footer{background:var(--navy);color:#dbe6ef;margin-top:20px}
.footer-grid{max-width:1160px;margin:0 auto;padding:28px 24px;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;font-family:Arial,sans-serif;font-size:14px}
.footer-grid>*{min-width:0}
.site-footer a{color:#dbe6ef}
.form-field{margin:14px 0}
.form-label{display:block;font-family:Arial,sans-serif;font-weight:700;margin-bottom:4px}
.form-input{width:100%;padding:10px;border:1px solid #9aa8b5;font-size:16px}
.form-textarea{width:100%;padding:10px;border:1px solid #9aa8b5;font-size:16px;min-height:160px}
.form-button{background:var(--navy);color:#fff;border:0;padding:12px 26px;font-size:16px;font-weight:700;cursor:pointer}
.faq-q{font-weight:700;margin:18px 0 4px}
.faq-a{margin:0 0 10px}
.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.blog-grid>*{min-width:0}
.blog-card{background:#fff;border:1px solid var(--line);padding:16px;min-width:0}
.not-found{max-width:880px;margin:60px auto;padding:0 24px;text-align:left}
.motif-note{font-family:Arial,sans-serif;font-size:13px;color:var(--muted)}
.spec-note{background:#fff;border-left:5px solid var(--accent);padding:14px 18px}
.callout{background:#eef2f5;border:1px solid var(--line);padding:16px 20px}
.callout-title{font-weight:700;color:var(--navy);margin:0 0 6px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.two-col>*{min-width:0}
/* --- tablet: evidence as two rows of three --- */
@media (max-width:1100px){
.evidence-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.evidence-item{padding:10px 12px;font-size:13px;line-height:1.5}
}
/* --- mobile: compact header, scroll-row nav + evidence row with fade scroll cues --- */
@media (max-width:640px){
.brandrow{padding:10px 4vw 6px}
.brand{font-size:24px}
a.brandcta{padding:8px 14px;font-size:14px}
.header-inner{padding:10px 4vw 6px}
.main-nav,.product-nav,.guide-nav{flex-wrap:nowrap;overflow-x:auto;padding-left:4vw;padding-right:4vw;scrollbar-width:none;-webkit-mask-image:linear-gradient(90deg,#000 88%,transparent 100%);mask-image:linear-gradient(90deg,#000 88%,transparent 100%)}
.main-nav::-webkit-scrollbar,.product-nav::-webkit-scrollbar,.guide-nav::-webkit-scrollbar{display:none}
.main-nav{gap:16px;padding-top:7px;padding-bottom:7px}
.product-nav{gap:14px;padding-top:6px;padding-bottom:6px}
.guide-nav{gap:14px;padding-top:6px;padding-bottom:6px}
.hero-inner{padding:20px 4vw}
.hero-title{font-size:26px}
.hero-lede{font-size:16px;line-height:1.55}
.main-content{padding:20px 4vw 10px}
.section>p{font-size:16px}
.footer-grid{padding:28px 4vw}
.two-col{grid-template-columns:1fr}
.evidence-strip{display:flex;overflow-x:auto;scroll-snap-type:x proximity;padding-bottom:6px;-webkit-mask-image:linear-gradient(90deg,#000 88%,transparent 100%);mask-image:linear-gradient(90deg,#000 88%,transparent 100%)}
.evidence-item{flex:0 0 230px;scroll-snap-align:start}
}