:root {
  --solutions-red: var(--brand-red, #b5222a);
  --solutions-deep: var(--brand-deep-red, #8e171d);
  --solutions-ink: var(--text-strong, #202124);
  --solutions-muted: var(--text-muted, #666a70);
  --solutions-line: var(--border-subtle, #e8eaed);
  --solutions-paper: var(--surface-paper, #fff);
  --solutions-soft: var(--surface-soft, #f5f7f8);
  --solutions-max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--solutions-ink); background: var(--solutions-paper); font-family: var(--font-sans, "Microsoft YaHei", sans-serif); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.solutions-shell { width: min(var(--solutions-max), calc(100% - 80px)); margin: 0 auto; }
.eyebrow { margin: 0; color: var(--solutions-red); font: 700 11px/1.1 Arial, sans-serif; letter-spacing: .2em; text-transform: uppercase; }

.solutions-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.95); border-bottom: 1px solid var(--solutions-line); backdrop-filter: blur(12px); }
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.solutions-brand { display: inline-flex; flex-direction: column; gap: 2px; line-height: 1.1; }
.solutions-brand b { font-size: 18px; letter-spacing: .12em; font-weight: 700; }
.solutions-brand span { color: #9a9ea4; font: 700 9px/1.2 Arial, sans-serif; letter-spacing: .16em; }
.solutions-nav { display: flex; align-items: center; gap: 26px; font-size: 13px; color: #4e5258; }
.solutions-nav a { padding: 26px 0 22px; border-bottom: 2px solid transparent; }
.solutions-nav a:hover, .solutions-nav a.active { color: var(--solutions-red); border-color: var(--solutions-red); }
.solutions-nav .nav-cta { padding: 10px 16px; color: #fff; background: var(--solutions-red); border-color: var(--solutions-red); }
.solutions-nav .nav-cta:hover { color: #fff; background: var(--solutions-deep); }
.menu-toggle { display: none; border: 1px solid var(--solutions-line); background: #fff; color: var(--solutions-ink); padding: 8px 12px; }

.solutions-hero { position: relative; overflow: hidden; min-height: 488px; background: #25272b; color: #fff; }
.hero-inner { position: relative; z-index: 1; padding-top: 108px; padding-bottom: 94px; }
.hero-inner .eyebrow { color: #e6a5aa; }
.solutions-hero h1 { max-width: 650px; margin: 18px 0 0; font-size: clamp(42px, 6vw, 76px); line-height: 1.15; letter-spacing: .06em; font-weight: 700; }
.solutions-hero h1 em { color: #edb0b4; font-style: normal; }
.hero-copy { max-width: 610px; margin: 26px 0 0; color: rgba(255,255,255,.78); font-size: 16px; line-height: 2; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 32px; }
.component-button { min-height: 46px; padding: 0 22px; display: inline-flex; align-items: center; justify-content: center; gap: 18px; border: 1px solid var(--solutions-red); background: var(--solutions-red); color: #fff; font-size: 14px; }
.component-button:hover { background: var(--solutions-deep); border-color: var(--solutions-deep); }
.hero-text-link { color: rgba(255,255,255,.78); font-size: 14px; }
.hero-text-link:hover { color: #fff; }
.hero-mark { position: absolute; right: 8vw; bottom: -56px; color: rgba(255,255,255,.06); font: 700 300px/1 Arial, sans-serif; letter-spacing: -.08em; }

.solutions-section { padding: 82px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 34px; }
.section-heading h2 { margin: 10px 0 0; font-size: clamp(26px, 3vw, 38px); line-height: 1.3; letter-spacing: .07em; }
.section-heading > p { max-width: 420px; margin: 0; color: var(--solutions-muted); font-size: 14px; line-height: 1.9; }
.solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.solution-card { position: relative; min-height: 280px; overflow: hidden; display: flex; flex-direction: column; justify-content: end; padding: 24px; color: #fff; background: #282b2f; }
.solution-card::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,.06) 0%, rgba(0,0,0,.78) 100%); z-index: 1; }
.solution-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(32,33,36,.14); }
.solution-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .86; transition: transform .3s ease; }
.solution-card:hover img { transform: scale(1.04); }
.solution-card-content { position: relative; z-index: 2; }
.solution-card .card-no { color: #f2a9ad; font: 700 12px/1 Arial, sans-serif; letter-spacing: .14em; }
.solution-card h3 { margin: 12px 0 0; font-size: 22px; letter-spacing: .08em; }
.solution-card .english { margin-top: 3px; color: rgba(255,255,255,.64); font: 700 9px/1.2 Arial, sans-serif; letter-spacing: .14em; }
.solution-card p { margin: 14px 0 0; color: rgba(255,255,255,.84); font-size: 13px; line-height: 1.75; }
.solution-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.solution-card .tags span { padding: 3px 7px; border: 1px solid rgba(255,255,255,.24); color: rgba(255,255,255,.76); font-size: 10px; }
.solution-detail { display: grid; gap: 5px; margin-top: 12px; color: rgba(255,255,255,.72); font-size: 11px; line-height: 1.6; }
.solution-detail b { margin-right: 5px; color: #f2a9ad; font-weight: 600; }
.solution-card .source { display: block; margin-top: 14px; color: rgba(255,255,255,.54); font-size: 10px; }
.content-loading { padding: 30px; border: 1px dashed var(--solutions-line); color: var(--solutions-muted); }

.dark-section { color: #fff; background: #26282c; }
.light-heading > p { color: rgba(255,255,255,.64); }
.light-heading .eyebrow { color: #e6a5aa; }
.flow-grid { display: grid; grid-template-columns: repeat(6, 1fr); border-top: 1px solid rgba(255,255,255,.16); border-left: 1px solid rgba(255,255,255,.16); }
.flow-step { min-height: 206px; padding: 24px 20px; border-right: 1px solid rgba(255,255,255,.16); border-bottom: 1px solid rgba(255,255,255,.16); }
.flow-step b, .lifecycle-step b { display: block; color: #eea9ae; font: 700 23px/1 Arial, sans-serif; }
.flow-step h3, .lifecycle-step h3 { margin: 24px 0 0; font-size: 17px; letter-spacing: .08em; }
.flow-step p, .lifecycle-step p { margin: 11px 0 0; color: rgba(255,255,255,.68); font-size: 13px; line-height: 1.8; }
.flow-note { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-top: 22px; color: rgba(255,255,255,.72); font-size: 13px; }
.flow-note strong { color: #fff; }

.lifecycle-grid { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--solutions-line); border-left: 1px solid var(--solutions-line); }
.lifecycle-step { min-height: 206px; padding: 24px 20px; border-right: 1px solid var(--solutions-line); border-bottom: 1px solid var(--solutions-line); }
.lifecycle-step h3 { margin-top: 24px; }
.lifecycle-step p { color: var(--solutions-muted); }
.data-note { margin: 18px 0 0; color: #8b8f94; font-size: 12px; }

.case-section { background: var(--solutions-soft); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.case-card { overflow: hidden; background: #fff; border: 1px solid var(--solutions-line); }
.case-card img { width: 100%; height: 178px; object-fit: cover; background: #e8e9eb; }
.case-card-body { padding: 22px 22px 24px; }
.case-card .case-category { color: var(--solutions-red); font: 700 10px/1.2 Arial, sans-serif; letter-spacing: .14em; }
.case-card h3 { margin: 11px 0 0; font-size: 19px; line-height: 1.5; letter-spacing: .04em; }
.case-card p { margin: 12px 0 0; color: var(--solutions-muted); font-size: 13px; line-height: 1.85; }
.case-highlights { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0 0; }
.case-highlights span { padding: 4px 7px; background: var(--solutions-soft); color: #6d7278; font-size: 10px; }
.case-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px; padding-top: 13px; border-top: 1px solid var(--solutions-line); color: #8a8f95; font-size: 10px; }
.case-status { color: var(--solutions-red); }

.publication-note { padding: 40px 0; background: #fff8f8; border-top: 1px solid #f0dfe1; border-bottom: 1px solid #f0dfe1; }
.publication-inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: center; }
.publication-inner h2 { margin: 10px 0 0; font-size: 25px; letter-spacing: .06em; }
.publication-inner > p { margin: 0; color: #6f6466; font-size: 13px; line-height: 1.9; }

.solutions-cta { padding: 54px 0; color: #fff; background: var(--solutions-red); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-inner .eyebrow { color: #f4c5c8; }
.cta-inner h2 { margin: 10px 0 0; font-size: 30px; letter-spacing: .08em; }
.cta-inner p { margin: 10px 0 0; color: rgba(255,255,255,.78); font-size: 14px; }
.button-light { color: var(--solutions-red); background: #fff; border-color: #fff; }
.button-light:hover { color: var(--solutions-deep); background: #f9e9ea; border-color: #f9e9ea; }

.solutions-footer { color: rgba(255,255,255,.74); background: #292b2f; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 60px; padding: 44px 0; }
.solutions-footer .solutions-brand b { color: #fff; }
.solutions-footer .solutions-brand span { color: rgba(255,255,255,.46); }
.solutions-footer p { max-width: 320px; margin: 18px 0 0; color: rgba(255,255,255,.56); font-size: 12px; line-height: 1.9; }
.footer-links, .footer-contact { display: grid; align-content: start; gap: 10px; font-size: 12px; }
.footer-links a:hover, .footer-contact a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 14px 0; color: rgba(255,255,255,.4); border-top: 1px solid rgba(255,255,255,.1); font-size: 10px; }

@media (max-width: 980px) {
  .solutions-shell { width: min(var(--solutions-max), calc(100% - 44px)); }
  .solutions-nav { gap: 16px; }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-grid { grid-template-columns: repeat(3, 1fr); }
  .lifecycle-grid { grid-template-columns: repeat(3, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .solutions-shell { width: calc(100% - 32px); }
  .header-inner { min-height: 62px; }
  .solutions-brand b { font-size: 16px; }
  .menu-toggle { display: block; }
  .solutions-nav { position: absolute; top: 62px; left: 16px; right: 16px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 16px 14px; background: #fff; border: 1px solid var(--solutions-line); box-shadow: 0 16px 26px rgba(0,0,0,.12); }
  .solutions-nav.open { display: flex; }
  .solutions-nav a, .solutions-nav .nav-cta { padding: 10px 0; border-bottom: 1px solid var(--solutions-line); }
  .solutions-nav a:last-child { border-bottom: 0; }
  .solutions-nav .nav-cta { margin-top: 6px; padding: 10px 12px; text-align: center; }
  .solutions-hero { min-height: 500px; }
  .hero-inner { padding-top: 74px; padding-bottom: 72px; }
  .solutions-hero h1 { font-size: 44px; }
  .hero-copy { font-size: 14px; }
  .hero-mark { right: -20px; bottom: -14px; font-size: 160px; }
  .solutions-section { padding: 58px 0; }
  .section-heading { display: block; margin-bottom: 26px; }
  .section-heading > p { margin-top: 15px; }
  .solution-grid, .case-grid { grid-template-columns: 1fr; }
  .solution-card { min-height: 258px; }
  .flow-grid, .lifecycle-grid { grid-template-columns: 1fr 1fr; }
  .flow-step, .lifecycle-step { min-height: 190px; padding: 20px 16px; }
  .flow-step h3, .lifecycle-step h3 { margin-top: 19px; font-size: 15px; }
  .flow-step p, .lifecycle-step p { font-size: 12px; }
  .publication-inner, .cta-inner, .footer-inner { display: block; }
  .publication-inner > p { margin-top: 18px; }
  .cta-inner .component-button { margin-top: 24px; }
  .footer-inner > * + * { margin-top: 28px; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: 5px; }
}