/* ====================================================
   福州易校通 · 智慧校园一体化平台 · 官网 v4
   现代教育信息化 SaaS 风格（钉钉教育/飞书风）
   ==================================================== */

:root {
  --brand:        #1A56DB;
  --brand-dark:   #0E3FA8;
  --brand-light:  #E6EFFC;
  --brand-glow:   rgba(26, 86, 219, .14);

  --accent:       #00B59C;
  --accent-light: #DEF6F1;

  --warn:         #FF6B35;
  --warn-light:   #FFEEE5;

  --signal:       #DC2626;

  --ink:          #0F172A;
  --ink-1:        #1E293B;
  --ink-2:        #334155;
  --ink-3:        #475569;
  --ink-4:        #64748B;
  --ink-5:        #94A3B8;
  --ink-6:        #CBD5E1;

  --bg:           #FFFFFF;
  --bg-1:         #F8FAFC;
  --bg-2:         #F1F5F9;
  --line:         #E2E8F0;
  --line-soft:    #EDF2F7;

  --ff-sans:    "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  --ff-mono:    "JetBrains Mono", "DM Mono", Consolas, monospace;
  --ff-display: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;

  --nav-h: 68px;
  --container: 1200px;

  --sh-xs: 0 1px 2px rgba(15, 23, 42, .04);
  --sh-sm: 0 2px 6px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
  --sh-md: 0 6px 18px rgba(15, 23, 42, .08), 0 2px 4px rgba(15, 23, 42, .04);
  --sh-lg: 0 16px 40px rgba(15, 23, 42, .12);
  --sh-brand: 0 8px 24px rgba(26, 86, 219, .25);

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 18px;
  --r-2xl: 22px;
  --r-full: 9999px;

  --t: 200ms cubic-bezier(.2, 0, 0, 1);
  --t-slow: 400ms cubic-bezier(.2, 0, 0, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink-1);
  font-family: var(--ff-sans); font-size: 15px; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "tnum";
}
a { color: var(--brand); text-decoration: none; transition: color var(--t); }
a:hover { color: var(--brand-dark); }
img, svg { max-width: 100%; display: block; }
ul, ol { list-style: none; padding: 0; margin: 0; }
button { font: inherit; cursor: pointer; border: none; background: transparent; color: inherit; }
::selection { background: var(--brand); color: #fff; }

.container {
  width: 100%; max-width: var(--container);
  margin: 0 auto; padding: 0 24px;
}
main.with-nav { padding-top: var(--nav-h); }

/* ============== Typography ============== */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ff-mono); font-size: 11px;
  font-weight: 600; letter-spacing: .12em;
  color: var(--brand); text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: ''; width: 22px; height: 2px;
  background: var(--brand); border-radius: 2px;
}
.eyebrow.no-line::before { display: none; }
.eyebrow.center { justify-content: center; }

h1, h2, h3, h4 {
  font-family: var(--ff-display); color: var(--ink);
  font-weight: 700; line-height: 1.25;
  letter-spacing: -.015em; margin: 0;
}
.h-1 {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.18; font-weight: 700;
  letter-spacing: -.02em;
}
.h-2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  line-height: 1.28; letter-spacing: -.012em;
}
.h-3 { font-size: 1.15rem; line-height: 1.4; font-weight: 600; }

.lead {
  font-size: clamp(.95rem, 1.1vw, 1.05rem);
  color: var(--ink-3); line-height: 1.75;
}

em { font-style: normal; }
em.brand { color: var(--brand); }

.text-muted { color: var(--ink-4); }
.text-mono { font-family: var(--ff-mono); }
.text-center { text-align: center; }

/* ============== Buttons ============== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; padding: 10px 22px; border-radius: var(--r-full);
  font-family: var(--ff-sans); font-size: 14px; font-weight: 600;
  white-space: nowrap; transition: all var(--t);
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--brand); color: #fff;
  box-shadow: var(--sh-brand);
}
.btn-primary:hover {
  background: var(--brand-dark); color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(26,86,219,.3);
}
.btn-outline {
  background: transparent; color: var(--ink-1);
  border-color: var(--line);
}
.btn-outline:hover {
  border-color: var(--brand); color: var(--brand);
  background: var(--brand-light);
}
.btn-light {
  background: #fff; color: var(--brand);
  box-shadow: var(--sh-sm);
}
.btn-light:hover { background: var(--bg-1); transform: translateY(-1px); }
.btn-ghost { color: var(--brand); padding: 10px 0; font-size: 13px; }
.btn-ghost:hover { color: var(--brand-dark); }
.btn-arrow::after { content: '→'; transition: transform var(--t); margin-left: 2px; }
.btn-arrow:hover::after { transform: translateX(3px); }
.btn-lg { padding: 13px 28px; font-size: 14.5px; }

/* ============== Pills ============== */
.pill {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 12px; border-radius: var(--r-full);
  background: var(--bg-2); color: var(--ink-2);
  font-size: 12px; font-weight: 500;
  border: 1px solid transparent;
}
.pill.brand { background: var(--brand-light); color: var(--brand); }
.pill.accent { background: var(--accent-light); color: var(--accent); }
.pill.warn { background: var(--warn-light); color: var(--warn); }
.pill.outline { background: #fff; border-color: var(--line); color: var(--ink-3); }
.pill.dot::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
}

/* ============== Navigation ============== */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h); z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line-soft);
  display: flex; align-items: center;
}
.site-nav .container { display: flex; align-items: center; gap: 2rem; }
.brand-logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-img { height: 30px; width: auto; }
.brand-tag {
  font-size: 13px; font-weight: 600; color: var(--ink);
  border-left: 1px solid var(--line);
  padding-left: 12px; letter-spacing: .04em;
}
.nav-links { display: flex; gap: 32px; flex: 1; }
.nav-links a {
  color: var(--ink-2); font-size: 14px; font-weight: 500;
  padding: 6px 0; position: relative; transition: color var(--t);
}
.nav-links a::after {
  content: ''; position: absolute;
  left: 50%; right: 50%; bottom: -2px;
  height: 2px; background: var(--brand);
  transition: left var(--t), right var(--t);
}
.nav-links a:hover, .nav-links a.active { color: var(--brand); }
.nav-links a:hover::after, .nav-links a.active::after { left: 0; right: 0; }
.nav-cta {
  background: var(--brand); color: #fff !important;
  padding: 9px 22px; border-radius: var(--r-full);
  font-size: 14px; font-weight: 600;
  box-shadow: var(--sh-brand);
  transition: all var(--t);
}
.nav-cta:hover { background: var(--brand-dark); transform: translateY(-1px); }
.nav-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; }
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); margin: 4px 0;
}

/* ============== Hero ============== */
.hero {
  position: relative;
  padding: 56px 0 64px;
  background:
    linear-gradient(180deg, #F4F8FE 0%, #FFFFFF 100%);
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(26,86,219,.12) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, #000 30%, transparent 100%);
  pointer-events: none;
}
.hero::after {
  content: ''; position: absolute;
  bottom: -200px; left: -200px;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,181,156,.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1.05fr;
  gap: 56px; align-items: center;
}
.hero-text { max-width: 540px; }
.hero-pre {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 6px; border-radius: var(--r-full);
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink-2);
  font-family: var(--ff-sans); font-size: 12px;
  font-weight: 500; letter-spacing: .02em;
  margin-bottom: 22px;
  box-shadow: var(--sh-xs);
}
.hero-pre-tag {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: var(--r-full);
  background: linear-gradient(135deg, var(--brand) 0%, var(--accent) 100%);
  color: #fff; font-size: 10.5px; font-weight: 700;
  letter-spacing: .04em;
}
.hero-pre-dot {
  display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .35; } }
.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.18; letter-spacing: -.022em;
  font-weight: 700; color: var(--ink);
  margin: 0 0 20px;
}
.hero-title em.brand {
  color: var(--brand);
  background: linear-gradient(135deg, var(--brand) 0%, var(--accent) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 16px; color: var(--ink-3);
  line-height: 1.75; margin: 0 0 28px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-trust {
  margin-top: 28px; padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex; gap: 22px; flex-wrap: wrap;
  font-size: 12px; color: var(--ink-4);
}
.hero-trust b { color: var(--ink); font-weight: 700; font-size: 14px; }
.hero-trust b em { color: var(--brand); font-style: normal; }

/* Hero visual: dashboard mockup */
.hero-visual {
  position: relative;
  width: 100%;
}
.hero-visual-img {
  width: 100%; height: auto; display: block;
  border-radius: var(--r-lg);
  box-shadow: var(--sh-lg);
  border: 1px solid var(--line);
}
.hero-visual-floating {
  position: absolute;
  background: #fff; border: 1px solid var(--line);
  padding: 12px 16px; border-radius: var(--r-md);
  box-shadow: var(--sh-md);
  display: flex; align-items: center; gap: 10px;
  font-size: 13px;
}
.hvf-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
.hvf-1 { top: -16px; left: -28px; }
.hvf-2 { bottom: -20px; right: -18px; }

@media (max-width: 880px) {
  .hero { padding: 40px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual-floating { display: none; }
}

/* ============== Sections ============== */
.section { padding: 64px 0; }
.section-tight { padding: 40px 0; }
.section-soft { background: var(--bg-1); }
.section-dark { background: var(--ink); color: rgba(255,255,255,.75); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .lead { color: rgba(255,255,255,.7); }
.section-dark .eyebrow { color: #5BB6FF; }
.section-dark .eyebrow::before { background: #5BB6FF; }

.sec-head { max-width: 720px; margin-bottom: 40px; }
.sec-head.center { margin: 0 auto 40px; text-align: center; }
.sec-head h2 { margin-bottom: 14px; }
.sec-head h2 em.brand {
  background: linear-gradient(135deg, var(--brand) 0%, var(--accent) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}
.sec-head .lead { margin: 0; }

/* Decorative section divider */
.sec-divider {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin: 0 auto 14px;
}
.sec-divider .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand);
}
.sec-divider .line {
  width: 36px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand), transparent);
}

/* ============== Bento Feature Grid (compact) ============== */
.feat-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.feat-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.feat-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.feat-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 28px 24px;
  transition: all var(--t); position: relative;
  overflow: hidden;
}
.feat-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--accent) 100%);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-slow);
}
.feat-card::after {
  content: ''; position: absolute;
  top: -40px; right: -40px;
  width: 120px; height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--brand-light) 0%, transparent 70%);
  opacity: 0; transition: opacity var(--t-slow);
}
.feat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-md);
  border-color: var(--brand);
}
.feat-card:hover::before { transform: scaleX(1); }
.feat-card:hover::after { opacity: .8; }
.feat-card > * { position: relative; z-index: 1; }

.feat-card-num {
  position: absolute; top: 22px; right: 24px;
  font-family: var(--ff-mono); font-size: 11px;
  color: var(--ink-5); font-weight: 600;
  letter-spacing: .04em;
}
.feat-icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-light) 0%, #FFFFFF 100%);
  color: var(--brand);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(26,86,219,.08);
  border: 1px solid rgba(26,86,219,.12);
  transition: all var(--t-slow);
}
.feat-card:hover .feat-icon {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(26,86,219,.32);
  transform: scale(1.05);
}
.feat-icon.accent {
  background: linear-gradient(135deg, var(--accent-light) 0%, #FFFFFF 100%);
  color: var(--accent);
  border-color: rgba(0,181,156,.15);
}
.feat-card:hover .feat-icon.accent {
  background: linear-gradient(135deg, var(--accent) 0%, #008473 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(0,181,156,.32);
}
.feat-icon.warn {
  background: linear-gradient(135deg, var(--warn-light) 0%, #FFFFFF 100%);
  color: var(--warn);
  border-color: rgba(255,107,53,.15);
}
.feat-card:hover .feat-icon.warn {
  background: linear-gradient(135deg, var(--warn) 0%, #D9501C 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(255,107,53,.32);
}
.icon { width: 26px; height: 26px; display: block; flex-shrink: 0; }
.icon-sm { width: 18px; height: 18px; display: block; flex-shrink: 0; }
.feat-icon svg.icon { width: 26px; height: 26px; }

.feat-card h3 {
  font-size: 16.5px; font-weight: 700;
  margin-bottom: 10px; color: var(--ink);
}
.feat-card p {
  margin: 0; color: var(--ink-3);
  font-size: 14px; line-height: 1.7;
}

@media (max-width: 880px) {
  .feat-grid, .feat-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .feat-grid, .feat-grid.cols-2, .feat-grid.cols-4 { grid-template-columns: 1fr; }
}

/* ============== Stats strip ============== */
.stats-strip {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden;
  position: relative;
}
.stats-strip::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--accent) 50%, var(--warn) 100%);
}
.stat-item {
  padding: 32px 24px; border-right: 1px solid var(--line);
  text-align: center; position: relative;
  transition: background var(--t);
}
.stat-item:hover { background: var(--bg-1); }
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: clamp(1.8rem, 2.6vw, 2.3rem);
  font-weight: 700; line-height: 1;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, var(--brand) 0%, var(--accent) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 13px; font-weight: 600;
  color: var(--ink); margin-bottom: 4px;
}
.stat-desc {
  font-family: var(--ff-mono); font-size: 11px;
  color: var(--ink-4); letter-spacing: .04em;
}
@media (max-width: 880px) {
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 480px) {
  .stats-strip { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--line); }
  .stat-item:last-child { border-bottom: none; }
}

/* ============== Split (text + visual) ============== */
.split {
  display: grid; grid-template-columns: 1fr 1.1fr;
  gap: 56px; align-items: center;
}
.split.text-right > .split-text { order: 2; }
.split.text-right > .split-visual { order: 1; }
.split-visual {
  width: 100%;
}
.split-visual img {
  width: 100%; height: auto; display: block;
  border-radius: var(--r-lg);
  box-shadow: var(--sh-md);
  border: 1px solid var(--line);
}
.split-visual.no-frame img {
  box-shadow: none; border: none;
}
.split-text h2 { margin-bottom: 16px; }
.split-text .lead { margin-bottom: 22px; }

@media (max-width: 880px) {
  .split { grid-template-columns: 1fr; gap: 32px; }
  .split.text-right > .split-text,
  .split.text-right > .split-visual { order: initial; }
}

/* ============== Page hero (sub pages) ============== */
.page-hero {
  background: linear-gradient(180deg, #F4F8FE 0%, #FFFFFF 100%);
  padding: 48px 0 36px;
  border-bottom: 1px solid var(--line);
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute;
  top: -150px; right: -150px;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,86,219,.06) 0%, transparent 70%);
}
.page-hero-content { position: relative; z-index: 1; }
.page-crumb {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--ff-mono); font-size: 11px;
  color: var(--ink-4); margin-bottom: 14px;
  letter-spacing: .04em;
}
.page-crumb a { color: var(--ink-4); }
.page-crumb a:hover { color: var(--brand); }
.page-crumb span { color: var(--ink-5); }
.page-title {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.18; letter-spacing: -.02em;
  font-weight: 700; color: var(--ink);
  margin: 0 0 16px; max-width: 24ch;
}
.page-title em.brand { color: var(--brand); }
.page-desc {
  max-width: 760px; font-size: 16px;
  color: var(--ink-3); line-height: 1.75; margin: 0;
}

/* ============== List rows ============== */
.list-rows {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden;
}
.list-row {
  display: grid; grid-template-columns: 56px 1fr auto;
  gap: 20px; align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line-soft);
  transition: background var(--t);
}
.list-row:last-child { border-bottom: none; }
.list-row:hover { background: var(--bg-1); }
.list-row-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--r-full);
  font-family: var(--ff-mono); font-size: 12px;
  font-weight: 700; color: var(--brand);
  letter-spacing: .04em;
  background: var(--brand-light);
  border: 1px solid rgba(26,86,219,.15);
  transition: all var(--t);
}
.list-row:hover .list-row-num {
  background: var(--brand); color: #fff;
  border-color: var(--brand);
  transform: scale(1.05);
}
.list-row-name {
  font-size: 15px; font-weight: 600;
  color: var(--ink); margin-bottom: 4px;
}
.list-row-desc {
  font-size: 13.5px; color: var(--ink-3);
  line-height: 1.6;
}
.list-row-meta {
  font-family: var(--ff-mono); font-size: 11px;
  color: var(--ink-4); letter-spacing: .04em;
  text-transform: uppercase; white-space: nowrap;
}
.list-row-arrow {
  color: var(--ink-5); font-size: 16px;
  transition: transform var(--t), color var(--t);
}
.list-row:hover .list-row-arrow { color: var(--brand); transform: translateX(3px); }

@media (max-width: 720px) {
  .list-row { grid-template-columns: 1fr; gap: 6px; padding: 18px 20px; }
  .list-row-meta, .list-row-arrow { display: none; }
}

/* ============== Tabs ============== */
.tabs-nav {
  display: inline-flex; gap: 4px; padding: 4px;
  background: var(--bg-2); border-radius: var(--r-full);
  margin-bottom: 32px; flex-wrap: wrap;
}
.tab-btn {
  padding: 8px 18px; border-radius: var(--r-full);
  font-size: 13.5px; font-weight: 500;
  color: var(--ink-3); transition: all var(--t);
  display: inline-flex; align-items: center; gap: 6px;
}
.tab-btn:hover:not(.active) { color: var(--ink); background: rgba(255,255,255,.6); }
.tab-btn.active {
  background: #fff; color: var(--brand);
  box-shadow: var(--sh-sm);
}
.tab-num {
  font-family: var(--ff-mono); font-size: 11px;
  color: var(--ink-5); font-weight: 600;
}
.tab-btn.active .tab-num { color: var(--brand); }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp .35s ease; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ============== Solution panel ============== */
.solution-panel {
  display: grid; grid-template-columns: 1fr 1.1fr;
  gap: 48px; align-items: center;
}
.solution-visual {
  background: linear-gradient(135deg, var(--brand-light) 0%, #FFFFFF 100%);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 40px; display: flex; align-items: center; justify-content: center;
  aspect-ratio: 1 / 1;
  position: relative; overflow: hidden;
}
.solution-visual::before {
  content: ''; position: absolute;
  top: -50px; right: -50px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,181,156,.15), transparent 70%);
}
.solution-visual img {
  max-width: 100%; max-height: 100%;
  position: relative; z-index: 1;
  border-radius: var(--r-md);
}
.solution-info h2 { margin-bottom: 12px; }
.solution-info .lead { margin-bottom: 24px; }
.solution-modules {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px 18px; margin-bottom: 24px;
  padding-top: 20px; border-top: 1px solid var(--line);
}
.solution-modules li {
  display: flex; align-items: center; gap: 8px;
  font-size: 13.5px; color: var(--ink-1);
}
.solution-modules li::before {
  content: '✓'; flex-shrink: 0;
  width: 16px; height: 16px;
  background: var(--brand); color: #fff;
  border-radius: 50%; font-size: 11px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.solution-stats {
  display: flex; gap: 28px; flex-wrap: wrap;
  padding-top: 20px; border-top: 1px solid var(--line);
}
.solution-stat-num {
  font-size: 22px; font-weight: 700;
  color: var(--ink); line-height: 1; margin-bottom: 4px;
}
.solution-stat-label {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: .06em; color: var(--ink-4);
  text-transform: uppercase;
}

@media (max-width: 880px) {
  .solution-panel { grid-template-columns: 1fr; gap: 28px; }
  .solution-visual { aspect-ratio: 4 / 3; padding: 24px; max-width: 480px; }
  .solution-modules { grid-template-columns: 1fr; }
}

/* ============== Cases (compact card grid) ============== */
.case-tabs {
  display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap;
}
.case-tab {
  padding: 8px 16px; border-radius: var(--r-full);
  background: #fff; border: 1.5px solid var(--line);
  font-size: 13.5px; font-weight: 500;
  color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 6px;
  transition: all var(--t);
}
.case-tab:hover:not(.active) { border-color: var(--brand); color: var(--brand); }
.case-tab.active { background: var(--brand); border-color: var(--brand); color: #fff; }
.case-tab-n { font-family: var(--ff-mono); font-size: 11px; opacity: .65; }

.case-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.case-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 26px 24px;
  transition: all var(--t); position: relative;
  overflow: hidden;
}
.case-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; bottom: 0; width: 3px;
  background: var(--brand);
  transform: scaleY(0); transform-origin: top;
  transition: transform var(--t-slow);
}
.case-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-md);
  border-color: var(--brand);
}
.case-card:hover::before { transform: scaleY(1); }
.case-card.hidden { display: none; }
.case-no {
  font-family: var(--ff-mono); font-size: 11px;
  font-weight: 700; color: var(--brand);
  letter-spacing: .08em; margin-bottom: 10px;
  display: inline-block;
  padding: 3px 10px; border-radius: var(--r-full);
  background: var(--brand-light);
}
.case-name {
  font-size: 15.5px; font-weight: 700;
  color: var(--ink); line-height: 1.4;
  margin-bottom: 8px; min-height: 44px;
}
.case-desc {
  font-size: 13px; color: var(--ink-3);
  line-height: 1.65; margin-bottom: 14px;
}
.case-status {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; padding: 4px 12px;
  border-radius: var(--r-full); font-weight: 600;
}
.case-status::before {
  content: ''; width: 6px; height: 6px;
  border-radius: 50%; background: currentColor;
  box-shadow: 0 0 0 3px rgba(0,0,0,.06);
  animation: pulse 2s ease-in-out infinite;
}
.case-status.maintain { background: var(--accent-light); color: var(--accent); }
.case-status.upgrading { background: var(--brand-light); color: var(--brand); }
.case-status.pending { background: var(--warn-light); color: var(--warn); }

@media (max-width: 880px) { .case-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) {
  .case-grid { grid-template-columns: 1fr; }
  .case-name { min-height: auto; }
}

/* ============== Form ============== */
.form-shell {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-xl); padding: 36px;
  box-shadow: var(--sh-sm);
}
.form-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 18px; margin-bottom: 18px;
}
.form-field { display: flex; flex-direction: column; }
.form-field.full { grid-column: 1 / -1; }
.form-label {
  font-size: 12px; font-weight: 600;
  color: var(--ink-2); margin-bottom: 7px;
  letter-spacing: .02em;
}
.form-label .req { color: var(--signal); margin-left: 2px; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  font-family: var(--ff-sans); font-size: 14px;
  color: var(--ink); background: #fff;
  outline: none; transition: all var(--t);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--ink-5); }
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-glow);
}
.form-textarea { min-height: 90px; resize: vertical; }
.form-actions {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap;
  margin-top: 22px; padding-top: 22px;
  border-top: 1px solid var(--line);
}
.form-hint { font-size: 12px; color: var(--ink-4); flex: 1 1 60%; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.type-chips { display: flex; gap: 7px; flex-wrap: wrap; }
.type-chip {
  padding: 7px 14px; border-radius: var(--r-full);
  border: 1.5px solid var(--line); background: #fff;
  font-size: 13px; font-weight: 500; color: var(--ink-1);
  transition: all var(--t);
}
.type-chip:hover:not(.active) { border-color: var(--brand); color: var(--brand); }
.type-chip.active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ============== Info card (contact) ============== */
.info-card {
  background: var(--ink); color: #fff;
  border-radius: var(--r-xl); padding: 36px;
  position: relative; overflow: hidden;
}
.info-card::before {
  content: ''; position: absolute;
  top: -100px; right: -100px;
  width: 280px; height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,86,219,.35), transparent 70%);
}
.info-card > * { position: relative; }
.info-block { margin-bottom: 28px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.12); }
.info-block:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.info-label {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: .12em; text-transform: uppercase;
  opacity: .7; margin-bottom: 8px;
}
.info-value {
  font-size: 17px; font-weight: 600;
  line-height: 1.45; margin-bottom: 5px;
}
.info-detail { font-size: 13px; opacity: .75; line-height: 1.65; }

/* ============== CTA band ============== */
.cta-band {
  background:
    radial-gradient(circle at 20% 100%, rgba(0,181,156,.4) 0%, transparent 50%),
    radial-gradient(circle at 100% 0%, rgba(255,215,138,.2) 0%, transparent 50%),
    linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  border-radius: var(--r-xl); padding: 48px 56px;
  color: #fff; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.4), transparent);
}
.cta-band::after {
  content: ''; position: absolute;
  bottom: -100px; right: -100px;
  width: 300px; height: 300px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 50%;
}
.cta-content {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 36px; align-items: center;
  position: relative;
}
.cta-band h2 { color: #fff; margin-bottom: 14px; }
.cta-band p {
  color: rgba(255,255,255,.85); margin: 0 0 20px;
  font-size: 15px; line-height: 1.7;
}
.cta-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.cta-actions .btn-light { background: #fff; color: var(--brand); }
.cta-actions .btn-outline {
  border-color: rgba(255,255,255,.4); color: #fff;
}
.cta-actions .btn-outline:hover {
  background: rgba(255,255,255,.1); border-color: #fff;
}
.cta-aside { text-align: right; }
.cta-big {
  font-size: clamp(2.6rem, 5vw, 4rem);
  font-weight: 700; line-height: 1;
  letter-spacing: -.025em; color: #fff; margin-bottom: 8px;
}
.cta-big-label {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: .12em; text-transform: uppercase;
  opacity: .7;
}
@media (max-width: 880px) {
  .cta-band { padding: 32px; }
  .cta-content { grid-template-columns: 1fr; gap: 24px; }
  .cta-aside { text-align: left; }
}

/* ============== Footer ============== */
.site-footer {
  background: var(--ink); color: rgba(255,255,255,.65);
  padding: 56px 0 22px;
}
.footer-top {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px; padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-logo {
  height: 30px; filter: brightness(0) invert(1);
  opacity: .9; margin-bottom: 18px;
}
.footer-desc {
  font-size: 13.5px; line-height: 1.75;
  color: rgba(255,255,255,.55);
  margin: 0 0 20px; max-width: 340px;
}
.footer-qr-row {
  display: flex; align-items: center; gap: 14px;
  margin-top: 18px;
}
.footer-qr-img {
  width: 80px; height: 80px;
  background: #fff; border-radius: var(--r-sm); padding: 5px;
}
.footer-qr-text {
  font-family: var(--ff-mono); font-size: 11px;
  color: rgba(255,255,255,.5); line-height: 1.65;
  letter-spacing: .04em;
}
.footer-col h4 {
  font-size: 13px; font-weight: 600; color: #fff;
  margin: 0 0 14px; letter-spacing: .04em;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: rgba(255,255,255,.55); font-size: 13.5px;
  transition: color var(--t);
}
.footer-col a:hover { color: #fff; }
.footer-addr {
  font-size: 12px; line-height: 1.7;
  color: rgba(255,255,255,.5);
  margin-top: 18px; padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,.08);
}
.footer-bottom {
  padding-top: 22px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  font-family: var(--ff-mono); font-size: 11.5px;
  color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.55); }
.footer-bottom a:hover { color: #fff; }

@media (max-width: 880px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 600px) { .footer-top { grid-template-columns: 1fr; } }

/* ============== Reveal ============== */
[data-reveal] {
  opacity: 0; transform: translateY(16px);
  transition: opacity 600ms cubic-bezier(.2,0,0,1),
              transform 600ms cubic-bezier(.2,0,0,1);
}
[data-reveal].in { opacity: 1; transform: none; }

/* ============== Mobile nav ============== */
@media (max-width: 880px) {
  .nav-toggle { display: flex; margin-left: auto; }
  .nav-cta { display: none; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: #fff; flex-direction: column; gap: 0;
    padding: 14px 24px; border-bottom: 1px solid var(--line);
    transform: translateY(-110%); transition: transform var(--t);
    box-shadow: var(--sh-md);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links li { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
  .nav-links li:last-child { border-bottom: none; }
  .brand-tag { display: none; }
}