/* ============================================================
   billit — Desktop marketing site styles
   Built on billit-tokens.css (design system source of truth)
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-surface);
  color: var(--fg-default);
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--billit-200); }
h1, h2, h3, h4, p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-sans); font-weight: var(--fw-semibold);
  border: 0; cursor: pointer; border-radius: var(--radius-md);
  transition: background .15s ease, transform .15s ease, box-shadow .15s ease, color .15s ease;
  white-space: nowrap; text-decoration: none; line-height: 1;
}
.btn:active { transform: scale(0.975); }
.btn--md { font-size: 16px; padding: 14px 22px; min-height: 52px; }
.btn--sm { font-size: 14px; padding: 9px 18px; min-height: 42px; }
.btn--lg { font-size: 17px; padding: 17px 28px; min-height: 58px; }
.btn--primary { background: var(--bg-brand-strong); color: #fff; box-shadow: var(--shadow-brand); }
.btn--primary:hover { background: var(--billit-800); }
.btn--primary:active { background: var(--billit-900); }
.btn--secondary { background: var(--billit-50); color: var(--billit-700); }
.btn--secondary:hover { background: var(--billit-100); }
.btn--ghost { background: transparent; color: var(--gray-700); }
.btn--ghost:hover { background: var(--gray-100); }
.btn--dark { background: #fff; color: var(--gray-900); }
.btn--dark:hover { background: var(--gray-100); }
.btn .ic { width: 19px; height: 19px; }
.btn--sm .ic { width: 16px; height: 16px; }

/* ---------- Badge ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: var(--fw-semibold); font-size: 13px;
  padding: 6px 13px; border-radius: var(--radius-full); line-height: 1.4; white-space: nowrap;
}
.badge--brand { background: var(--billit-50); color: var(--billit-700); }
.badge--solid { background: var(--bg-brand-strong); color: #fff; white-space: nowrap; }
.badge--success { background: var(--success-bg); color: var(--success-fg); white-space: nowrap; }
.badge--dark { background: rgba(255,255,255,0.08); color: var(--billit-300); }
.badge .dot { width: 6px; height: 6px; border-radius: var(--radius-full); background: currentColor; }
.badge--success .dot { background: var(--success); }

/* ---------- Section scaffolding ---------- */
.section { padding: 104px 0; }
.section--tight { padding: 88px 0; }
.overline {
  font-size: 13px; font-weight: var(--fw-bold); letter-spacing: var(--ls-wide);
  text-transform: uppercase; color: var(--billit-700); margin-bottom: 14px;
}
.overline--dark { color: var(--billit-300); }
.section-head { max-width: 640px; }
.section-head--center { margin: 0 auto; text-align: center; }
.section-title {
  font-size: 40px; font-weight: var(--fw-extrabold);
  line-height: var(--lh-snug); letter-spacing: var(--ls-tight); color: var(--fg-strong);
}
.section-sub {
  font-size: 18px; line-height: var(--lh-normal); color: var(--fg-muted); margin-top: 16px;
}
.section--dark .section-title { color: #fff; }
.section--dark .section-sub { color: var(--dark-on-muted); }

/* ============================================================
   SUB-PAGE COMPONENTS (how / faq / stations)
   ============================================================ */

/* ---------- Page hero band (lighter than the home hero) ---------- */
.page-hero {
  background: linear-gradient(180deg, #fff 0%, var(--billit-50) 100%);
  padding: 72px 0 64px; text-align: center; border-bottom: 1px solid var(--gray-100);
}
.page-hero .container { max-width: 760px; }
.page-hero h1 {
  font-size: 46px; font-weight: var(--fw-extrabold); letter-spacing: -0.02em;
  line-height: 1.2; color: var(--gray-900); margin-top: 14px;
}
.page-hero p { font-size: 18px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 16px; }
.breadcrumb {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 22px;
  font-size: 13.5px; color: var(--gray-500);
}
.breadcrumb a { color: var(--gray-600); }
.breadcrumb a:hover { color: var(--billit-700); }
.breadcrumb .ic { width: 14px; height: 14px; color: var(--gray-300); }

/* ---------- Big vertical steps (how page) ---------- */
.steps-rows { display: flex; flex-direction: column; gap: 20px; margin-top: 56px; max-width: 820px; margin-left: auto; margin-right: auto; }
.step-row {
  display: grid; grid-template-columns: 88px 1fr; gap: 28px; align-items: flex-start;
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: 32px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.step-row:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.step-row-num {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.step-row-num .step-ic { margin: 0; }
.step-row-num .num-label { font-size: 12px; font-weight: var(--fw-extrabold); letter-spacing: var(--ls-wide); color: var(--billit-600); }
.step-row-body h3 { font-size: 21px; font-weight: var(--fw-bold); color: var(--gray-900); }
.step-row-body p { font-size: 16px; line-height: var(--lh-relaxed); color: var(--gray-600); margin-top: 10px; }

/* ---------- Tips grid (how page) ---------- */
.tips-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.tip-card {
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: 30px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.tip-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.tip-ic {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--billit-50);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.tip-ic .ic { width: 24px; height: 24px; color: var(--billit-600); }
.tip-card h3 { font-size: 17px; font-weight: var(--fw-bold); color: var(--gray-900); }
.tip-card p { font-size: 14.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 8px; }

/* ---------- Pricing-soon card (faq page) ---------- */
.price-card {
  max-width: 640px; margin: 0 auto; text-align: center;
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm); padding: 48px 40px;
}
.price-ic {
  width: 64px; height: 64px; border-radius: var(--radius-lg); background: var(--billit-50);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 22px;
}
.price-ic .ic { width: 32px; height: 32px; color: var(--billit-600); }
.price-card .price-badge { margin-bottom: 18px; }
.price-card h3 { font-size: 24px; font-weight: var(--fw-extrabold); color: var(--gray-900); letter-spacing: var(--ls-tight); }
.price-card p { font-size: 16px; line-height: var(--lh-relaxed); color: var(--gray-600); margin-top: 12px; }
.price-card h3 .accent { color: var(--billit-600); }
.price-units {
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
  margin-top: 28px;
}
.price-unit {
  flex: 1 1 0; min-width: 150px; max-width: 240px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 22px 20px; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  background: var(--gray-50);
}
.price-unit-dur {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 15px; font-weight: var(--fw-semibold); color: var(--gray-700);
}
.price-unit-dur .ic { width: 16px; height: 16px; color: var(--billit-600); }
.price-unit-amt { font-size: 22px; font-weight: var(--fw-extrabold); color: var(--gray-900); letter-spacing: var(--ls-tight); }
.price-foot { font-size: 14px !important; color: var(--gray-500) !important; margin-top: 22px !important; }

/* ---------- FAQ category grouping ---------- */
.faq-cat { max-width: 760px; margin: 0 auto; }
.faq-cat + .faq-cat { margin-top: 44px; }
.faq-cat-head {
  display: flex; align-items: center; gap: 10px; margin-bottom: 18px;
  font-size: 14px; font-weight: var(--fw-bold); letter-spacing: var(--ls-wide);
  text-transform: uppercase; color: var(--billit-700);
}
.faq-cat-head .ic { width: 18px; height: 18px; }

/* ---------- Contact band (faq page) ---------- */
.contact-card {
  max-width: 760px; margin: 56px auto 0; text-align: center;
  background: var(--gray-50); border: 1px solid var(--gray-100); border-radius: var(--radius-xl);
  padding: 40px;
}
.contact-card h3 { font-size: 20px; font-weight: var(--fw-bold); color: var(--gray-900); }
.contact-card p { font-size: 15.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 10px; }
.contact-actions { display: flex; gap: 12px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }

/* ---------- Stations page: large station card ---------- */
.station-hero-card {
  max-width: 880px; margin: 0 auto;
  background: var(--dark-800); border: 1px solid var(--dark-700); border-radius: var(--radius-2xl); padding: 28px;
}
.station-hero-card .map-ph { height: 360px; }
.station-hero-meta { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-top: 26px; flex-wrap: wrap; }
.station-hero-meta h3 { font-size: 24px; font-weight: var(--fw-bold); color: #fff; }
.station-hero-meta p { font-size: 15px; color: var(--dark-on-muted); margin-top: 8px; line-height: var(--lh-normal); }
.station-hero-badges { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Location features (stations page) ---------- */
.loc-feats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 56px; max-width: 880px; margin-left: auto; margin-right: auto; }
.loc-feat {
  display: flex; gap: 18px; align-items: flex-start;
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: 26px;
}
.loc-feat .loc-ic {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--billit-50); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.loc-feat .loc-ic .ic { width: 24px; height: 24px; color: var(--billit-600); }
.loc-feat h4 { font-size: 16.5px; font-weight: var(--fw-bold); color: var(--gray-900); }
.loc-feat p { font-size: 14.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 6px; }

/* ---------- Expansion / request card (stations page) ---------- */
.expand-card {
  max-width: 760px; margin: 56px auto 0; text-align: center;
  background: linear-gradient(180deg, var(--billit-50) 0%, #fff 100%);
  border: 1px solid var(--billit-100); border-radius: var(--radius-xl); padding: 44px 40px;
}
.expand-ic {
  width: 56px; height: 56px; border-radius: var(--radius-lg); background: #fff;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; box-shadow: var(--shadow-xs);
}
.expand-ic .ic { width: 28px; height: 28px; color: var(--billit-600); }
.expand-card h3 { font-size: 22px; font-weight: var(--fw-extrabold); color: var(--gray-900); letter-spacing: var(--ls-tight); }
.expand-card p { font-size: 16px; line-height: var(--lh-relaxed); color: var(--gray-600); margin-top: 12px; }
.expand-card .btn { margin-top: 24px; }

/* ============================================================
   HOW PAGE — first-timer walkthrough guide
   ============================================================ */

/* Intro lead under the page hero */
.guide-lead { max-width: 720px; margin: 0 auto; text-align: center; }
.guide-lead .package-link {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 20px;
  font-size: 15px; font-weight: var(--fw-semibold); color: var(--billit-700);
}
.guide-lead .package-link .ic { width: 16px; height: 16px; }
.guide-lead .package-link:hover { color: var(--billit-800); }

/* ---------- Walkthrough zigzag rows ---------- */
.walk-rows { display: flex; flex-direction: column; gap: 64px; margin-top: 64px; }
.walk-row { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.walk-row:nth-child(even) .walk-visual { order: 2; }
.walk-step-tag {
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: 16px;
}
.walk-step-tag .step-ic { margin: 0; width: 48px; height: 48px; }
.walk-step-tag .step-ic .ic { width: 24px; height: 24px; }
.walk-step-tag .num { font-size: 13px; font-weight: var(--fw-extrabold); letter-spacing: var(--ls-wide); color: var(--billit-600); }
.walk-body h3 { font-size: 28px; font-weight: var(--fw-extrabold); color: var(--gray-900); letter-spacing: var(--ls-tight); line-height: var(--lh-snug); }
.walk-body p { font-size: 16px; line-height: var(--lh-relaxed); color: var(--gray-600); margin-top: 14px; }
.walk-see {
  display: flex; align-items: flex-start; gap: 10px; margin-top: 20px; padding: 14px 16px;
  background: var(--billit-50); border-radius: var(--radius-md);
  font-size: 14.5px; line-height: var(--lh-normal); color: var(--billit-800);
}
.walk-see .ic { width: 18px; height: 18px; color: var(--billit-600); flex-shrink: 0; margin-top: 1px; }

/* ---------- Phone screen placeholder ---------- */
.phone-mock {
  width: 264px; margin: 0 auto; background: var(--dark-900); border-radius: 40px; padding: 12px;
  box-shadow: var(--shadow-lg); position: relative;
}
.phone-mock::before {
  content: ""; position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  width: 64px; height: 6px; border-radius: var(--radius-full); background: rgba(255,255,255,0.18); z-index: 2;
}
.phone-screen {
  background: var(--gray-50); border-radius: 30px; aspect-ratio: 9 / 17; overflow: hidden;
  display: flex; flex-direction: column;
}
.phone-status { height: 38px; display: flex; align-items: center; justify-content: center; padding-top: 8px; }
.phone-status span { font-size: 12px; font-weight: var(--fw-bold); color: var(--gray-500); white-space: nowrap; }
.phone-body { flex: 1; display: flex; flex-direction: column; padding: 16px; gap: 12px; }
.scr-ph-label { text-align: center; font-size: 12px; color: var(--gray-400); padding: 6px 0 12px; }

/* screen: QR scan viewfinder */
.scan-view {
  flex: 1; border-radius: var(--radius-lg); background: var(--dark-800);
  display: flex; align-items: center; justify-content: center; position: relative; margin: 8px 0;
}
.scan-view .corner { position: absolute; width: 26px; height: 26px; border: 3px solid var(--billit-400); }
.scan-view .corner.tl { top: 18px; left: 18px; border-right: 0; border-bottom: 0; border-radius: 8px 0 0 0; }
.scan-view .corner.tr { top: 18px; right: 18px; border-left: 0; border-bottom: 0; border-radius: 0 8px 0 0; }
.scan-view .corner.bl { bottom: 18px; left: 18px; border-right: 0; border-top: 0; border-radius: 0 0 0 8px; }
.scan-view .corner.br { bottom: 18px; right: 18px; border-left: 0; border-top: 0; border-radius: 0 0 8px 0; }
.scan-view .ic { width: 52px; height: 52px; color: #fff; }

/* generic screen card (rent/use) */
.scr-card {
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-md);
  padding: 14px; display: flex; flex-direction: column; gap: 10px;
}
.scr-card-title { font-size: 13.5px; font-weight: var(--fw-bold); color: var(--gray-900); display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.scr-items { display: flex; flex-direction: column; gap: 8px; }
.scr-item { display: flex; align-items: center; gap: 9px; font-size: 12.5px; color: var(--gray-700); }
.scr-item .ic { width: 15px; height: 15px; color: var(--billit-600); flex-shrink: 0; }
.scr-btn {
  margin-top: auto; background: var(--bg-brand-strong); color: #fff; border-radius: var(--radius-sm);
  text-align: center; padding: 13px; font-size: 14px; font-weight: var(--fw-bold);
  display: flex; align-items: center; justify-content: center; gap: 7px;
}
.scr-btn .ic { width: 16px; height: 16px; }
.scr-status-chip {
  align-self: flex-start; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
  background: var(--success-bg); color: var(--success-fg); border-radius: var(--radius-full);
  padding: 5px 11px; font-size: 12px; font-weight: var(--fw-semibold);
}
.scr-status-chip .dot { width: 6px; height: 6px; border-radius: var(--radius-full); background: var(--success); }
/* screen: done */
.scr-done { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; text-align: center; }
.scr-done .done-ic {
  width: 76px; height: 76px; border-radius: var(--radius-full); background: var(--billit-50);
  display: flex; align-items: center; justify-content: center;
}
.scr-done .done-ic .ic { width: 40px; height: 40px; color: var(--billit-600); }
.scr-done strong { font-size: 17px; font-weight: var(--fw-extrabold); color: var(--gray-900); }
.scr-done span { font-size: 13px; color: var(--gray-500); }

/* ---------- Checklist ---------- */
.checklist {
  max-width: 760px; margin: 56px auto 0; background: #fff;
  border: 1px solid var(--gray-100); border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: 16px 36px;
}
.check-item { display: flex; gap: 16px; align-items: flex-start; padding: 22px 0; border-bottom: 1px solid var(--gray-100); }
.check-item:last-child { border-bottom: 0; }
.check-mark {
  width: 30px; height: 30px; border-radius: var(--radius-full); background: var(--billit-50); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.check-mark .ic { width: 18px; height: 18px; color: var(--billit-600); }
.check-item h4 { font-size: 16.5px; font-weight: var(--fw-bold); color: var(--gray-900); }
.check-item p { font-size: 14.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 4px; }

/* ---------- Notice / return detail ---------- */
.notice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 56px; }
.notice-card {
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: 32px;
}
.notice-card .notice-ic {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--billit-50);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.notice-card .notice-ic .ic { width: 24px; height: 24px; color: var(--billit-600); }
.notice-card h3 { font-size: 19px; font-weight: var(--fw-bold); color: var(--gray-900); }
.notice-card p { font-size: 15px; line-height: var(--lh-relaxed); color: var(--gray-600); margin-top: 10px; }
.notice-card .soon-tag {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 14px;
  font-size: 13px; font-weight: var(--fw-semibold); color: var(--gray-500);
}
.notice-card .soon-tag .ic { width: 15px; height: 15px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,0.82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--gray-100); box-shadow: 0 1px 0 rgba(23,31,40,0.04); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.header-logo img { height: 27px; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  font-size: 15px; font-weight: var(--fw-medium); color: var(--gray-700);
  padding: 10px 16px; border-radius: var(--radius-sm); transition: background .15s, color .15s;
  white-space: nowrap;
}
.nav a:hover { background: var(--gray-100); color: var(--gray-900); }
.nav a[aria-current="page"] { color: var(--billit-700); background: var(--billit-50); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.hamburger {
  display: none; background: transparent; border: 0; cursor: pointer;
  padding: 10px; color: var(--gray-800); border-radius: var(--radius-sm);
  min-width: 44px; min-height: 44px; align-items: center; justify-content: center;
}
.hamburger:hover { background: var(--gray-100); }

/* mobile drawer */
.mobile-nav { display: none; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, #fff 0%, var(--billit-50) 100%);
  padding: 88px 0 104px;
  position: relative; overflow: hidden;
}
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 64px; align-items: center;
}
.hero h1 {
  font-size: 56px; font-weight: var(--fw-extrabold); line-height: 1.18;
  letter-spacing: -0.02em; color: var(--gray-900); margin-top: 22px;
}
.hero h1 .accent { color: var(--billit-600); }
.hero-sub {
  font-size: 19px; line-height: var(--lh-normal); color: var(--gray-600);
  margin-top: 20px; max-width: 480px;
}
.hero-cta { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.hero-meta {
  display: flex; align-items: center; gap: 20px; margin-top: 28px;
  font-size: 14px; color: var(--gray-600); flex-wrap: wrap;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta .ic { width: 17px; height: 17px; color: var(--billit-600); }

/* hero product visual */
.hero-visual { position: relative; }
.product-card {
  background: #fff; border-radius: var(--radius-2xl); box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100); padding: 28px;
}
.product-card-top {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px;
}
.product-card-title { font-size: 17px; font-weight: var(--fw-bold); color: var(--gray-900); white-space: nowrap; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.product-tile {
  background: var(--gray-50); border-radius: var(--radius-lg);
  padding: 22px 10px; display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center;
}
.product-tile .tile-ic {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: #fff;
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-xs);
}
.product-tile .tile-ic .ic { width: 28px; height: 28px; color: var(--billit-600); }
.product-tile span { font-size: 13.5px; font-weight: var(--fw-semibold); color: var(--gray-700); }
.product-card-foot {
  display: flex; align-items: center; gap: 10px; margin-top: 22px; padding-top: 20px;
  border-top: 1px solid var(--gray-100); font-size: 14.5px; color: var(--gray-700); font-weight: var(--fw-medium);
}
.product-card-foot .ic { width: 18px; height: 18px; color: var(--billit-600); flex-shrink: 0; }
.product-card-foot .dot-sep { color: var(--gray-300); }
/* floating QR chip — sits fully above the card's top edge, clear of content */
.qr-chip {
  position: absolute; right: 0; bottom: calc(100% + 14px); top: auto;
  background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100); padding: 12px 16px;
  display: flex; align-items: center; gap: 12px;
}
.qr-chip .qr-ic {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--billit-500);
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-brand);
}
.qr-chip .qr-ic .ic { width: 24px; height: 24px; color: #fff; }
.qr-chip-text strong { display: block; font-size: 14px; font-weight: var(--fw-bold); color: var(--gray-900); }
.qr-chip-text span { font-size: 12.5px; color: var(--gray-600); }

/* ---------- Pain points (quote-led, calm tinted cards) ---------- */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.pain-card {
  background: var(--gray-50); border: 1px solid var(--gray-100); border-radius: var(--radius-lg);
  padding: 32px;
}
.pain-icon { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px; color: var(--gray-400); }
.pain-icon .ic { width: 20px; height: 20px; }
.pain-icon .pain-tag { font-size: 12.5px; font-weight: var(--fw-semibold); letter-spacing: var(--ls-wide); text-transform: uppercase; color: var(--gray-600); }
.pain-quote { font-size: 23px; font-weight: var(--fw-extrabold); color: var(--gray-900); line-height: var(--lh-snug); letter-spacing: var(--ls-snug); }
.pain-desc { font-size: 15.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 12px; }

/* ---------- Package (product-forward, emphasis cards) ---------- */
/* ---------- Section tonal bands ----------
   Each tinted band feathers to white at its top & bottom edges, so it
   joins white neighbours seamlessly (white→white) while the body keeps a
   distinct tone. No hard seams, sections still read as separate. */
.section--mint {
  background: linear-gradient(180deg,
    var(--billit-50) 0%,
    var(--bg-surface) 38%,
    var(--bg-surface) 100%);
}
.package-section {
  background: linear-gradient(180deg,
    var(--bg-surface) 0%,
    var(--gray-100) 15%,
    var(--gray-100) 85%,
    var(--bg-surface) 100%);
}
.package-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.package-card {
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm); padding: 40px 32px;
}
.package-ic {
  width: 64px; height: 64px; border-radius: var(--radius-lg); background: var(--billit-50);
  display: flex; align-items: center; justify-content: center; margin-bottom: 24px;
}
.package-ic .ic { width: 34px; height: 34px; color: var(--billit-600); }
.package-card h3 { font-size: 21px; font-weight: var(--fw-bold); color: var(--gray-900); }
.package-card p { font-size: 15.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 10px; }
.package-note {
  display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 36px;
  font-size: 14.5px; color: var(--gray-600);
}
.package-note .ic { width: 17px; height: 17px; color: var(--billit-600); }

/* ---------- How it works ---------- */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 56px; position: relative; }
.step-card {
  background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: 30px 26px; position: relative;
}
.step-num {
  font-size: 13px; font-weight: var(--fw-extrabold); color: var(--billit-600);
  letter-spacing: var(--ls-wide); margin-bottom: 16px;
}
.step-ic {
  width: 56px; height: 56px; border-radius: var(--radius-md); background: var(--billit-500);
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-brand); margin-bottom: 18px;
}
.step-ic .ic { width: 28px; height: 28px; color: #fff; }
.step-card h3 { font-size: 18px; font-weight: var(--fw-bold); color: var(--gray-900); }
.step-card p { font-size: 14.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 8px; }
.step-arrow {
  position: absolute; top: 50%; right: -16px; transform: translateY(-50%); z-index: 2;
  color: var(--billit-300);
}
.step-arrow .ic { width: 24px; height: 24px; }

/* ---------- Stations (dark) ---------- */
/* Body stays solid dark-900 for legibility; top & bottom edges feather
   to the white seam color so the band joins its light neighbours softly.
   Fade zones (112px) stay inside the 128px padding, so no text ever
   lands on a mid-tone. */
.stations {
  background: linear-gradient(180deg,
    var(--bg-surface) 0,
    var(--dark-900) 112px,
    var(--dark-900) calc(100% - 112px),
    var(--bg-surface) 100%);
  padding-top: 128px; padding-bottom: 128px;
}
.stations-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: center; }
.station-card {
  background: var(--dark-800); border: 1px solid var(--dark-700); border-radius: var(--radius-2xl); padding: 24px;
}
.station-feat .feat-ic {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--dark-700); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.station-info { display: flex; align-items: flex-start; justify-content: space-between; margin-top: 22px; }
.station-info h3 { font-size: 20px; font-weight: var(--fw-bold); color: #fff; }
.station-info p { font-size: 14.5px; color: var(--dark-on-muted); margin-top: 6px; }
.stations-list { display: flex; flex-direction: column; gap: 14px; margin-top: 32px; }
.station-feat { display: flex; gap: 16px; align-items: flex-start; }
.map-ph {
  height: 300px; border-radius: var(--radius-lg); background: var(--dark-700);
  display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden;
}
.map-ph::before {
  content: ""; position: absolute; inset: 0; opacity: 0.45;
  background-image: linear-gradient(var(--dark-600) 1px, transparent 1px), linear-gradient(90deg, var(--dark-600) 1px, transparent 1px);
  background-size: 34px 34px;
}
/* real location map image */
.map-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
/* hide the abstract grid overlay when a real map image is shown */
.map-ph:has(.map-img)::before { display: none; }

/* abstract campus blocks behind the pin (fallback when no image) */
.map-blocks { position: absolute; inset: 0; }
.map-blocks i {
  position: absolute; display: block; border-radius: 5px;
  background: var(--dark-600); border: 1px solid rgba(255,255,255,0.04);
}
.map-blocks i:nth-child(1) { width: 84px; height: 58px; left: 30px; top: 44px; }
.map-blocks i:nth-child(2) { width: 64px; height: 88px; right: 40px; top: 30px; }
.map-blocks i:nth-child(3) { width: 96px; height: 46px; left: 54px; bottom: 36px; }
.map-blocks i:nth-child(4) { width: 58px; height: 52px; right: 56px; bottom: 44px; }
/* faint road */
.map-blocks i:nth-child(5) {
  width: 130%; height: 12px; left: -15%; top: 50%; background: rgba(0,200,150,0.10);
  border: 0; transform: rotate(-18deg); border-radius: 0;
}
.map-pin {
  position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.map-pin .pin-dot {
  width: 54px; height: 54px; border-radius: var(--radius-full); background: var(--billit-500);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 0 10px rgba(0,200,150,0.16), 0 0 0 20px rgba(0,200,150,0.08);
}
.map-pin .pin-dot .ic { width: 26px; height: 26px; color: #fff; }
.map-pin .pin-label {
  background: rgba(11,24,19,0.7); backdrop-filter: blur(4px);
  border: 1px solid var(--dark-600); border-radius: var(--radius-full);
  padding: 7px 15px; font-size: 13px; font-weight: var(--fw-semibold); color: #fff;
}
.station-feat .feat-ic .ic { width: 22px; height: 22px; color: var(--billit-300); }
.station-feat h4 { font-size: 16px; font-weight: var(--fw-semibold); color: #fff; }
.station-feat p { font-size: 14px; line-height: var(--lh-normal); color: var(--dark-on-muted); margin-top: 4px; }
.station-soon {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 28px;
  font-size: 14px; color: var(--dark-on-muted);
}
.station-soon .ic { width: 17px; height: 17px; color: var(--billit-300); }

/* ---------- Why billit (borderless, light, big icons) ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin-top: 56px; }
.why-card {
  background: transparent; border: 0; box-shadow: none; padding: 0;
}
.why-ic {
  width: 64px; height: 64px; border-radius: var(--radius-lg); background: var(--billit-50);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.why-ic .ic { width: 32px; height: 32px; color: var(--billit-600); }
.why-card h3 { font-size: 18px; font-weight: var(--fw-bold); color: var(--gray-900); }
.why-card p { font-size: 14.5px; line-height: var(--lh-normal); color: var(--gray-600); margin-top: 8px; }

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 760px; margin: 56px auto 0; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  border: 1px solid var(--gray-200); border-radius: var(--radius-lg); overflow: hidden;
  background: #fff; transition: background .2s, border-color .2s;
}
.faq-item.is-open { background: var(--billit-50); border-color: var(--billit-200); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 22px 24px; background: transparent; border: 0; cursor: pointer; text-align: left;
  font-size: 17px; font-weight: var(--fw-bold); color: var(--gray-900); font-family: var(--font-sans);
}
.faq-q .chev { flex-shrink: 0; transition: transform .25s ease; color: var(--gray-400); }
.faq-item.is-open .faq-q .chev { transform: rotate(180deg); color: var(--billit-600); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .28s ease; }
.faq-a-inner { padding: 0 24px 24px; font-size: 15.5px; line-height: var(--lh-relaxed); color: var(--gray-700); }

/* ---------- Closing CTA ---------- */
/* Top edge feathers from the white seam into solid brand green; bottom
   edge stays hard against the dark footer (the excluded bottom band). */
.cta-band {
  background: linear-gradient(180deg,
    var(--bg-surface) 0,
    var(--bg-brand-strong) 104px,
    var(--bg-brand-strong) 100%);
  text-align: center; padding-top: 120px;
}
.cta-band .container { max-width: 720px; }
.cta-mark {
  width: 64px; height: 64px; border-radius: 18px; margin: 0 auto 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.22);
}
.cta-band h2 { font-size: 42px; font-weight: var(--fw-extrabold); letter-spacing: -0.02em; color: #fff; line-height: 1.2; }
.cta-band p { font-size: 18px; line-height: var(--lh-normal); color: rgba(255,255,255,0.94); margin-top: 16px; }
.cta-actions { display: flex; gap: 12px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }
.cta-band .btn--ghost { color: #fff; background: rgba(255,255,255,0.14); }
.cta-band .btn--ghost:hover { background: rgba(255,255,255,0.22); }

/* ---------- Footer ---------- */
.site-footer { background: var(--dark-900); padding: 64px 0 56px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand img { height: 26px; margin-bottom: 18px; }
.footer-brand p { font-size: 14.5px; line-height: var(--lh-normal); color: var(--dark-on-muted); max-width: 320px; }
.footer-col h4 { font-size: 13px; font-weight: var(--fw-bold); letter-spacing: var(--ls-wide); text-transform: uppercase; color: var(--dark-on-muted); margin-bottom: 18px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 13px; }
.footer-col a { font-size: 14.5px; color: var(--dark-on); opacity: 0.78; transition: opacity .15s; }
.footer-col a:hover { opacity: 1; color: var(--billit-300); }
.footer-bottom {
  border-top: 1px solid var(--dark-700); padding-top: 28px;
  font-size: 13px; line-height: var(--lh-relaxed); color: var(--dark-on-muted); letter-spacing: 0;
}
.footer-bottom .biz strong { color: var(--dark-on); font-weight: var(--fw-semibold); }
.footer-bottom .copy { margin-top: 10px; opacity: 0.7; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1000px) {
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .step-arrow { display: none; }
  .tips-grid { grid-template-columns: 1fr; }
  .loc-feats { grid-template-columns: 1fr; }
  .walk-row { grid-template-columns: 1fr; gap: 32px; }
  .walk-row .walk-visual { order: 0 !important; }
  .notice-grid { grid-template-columns: 1fr; }
}
@media (max-width: 920px) {
  .nav { display: none; }
  .hamburger { display: inline-flex; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero h1 { font-size: 44px; }
  .stations-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .section-title { font-size: 32px; }
  .cta-band h2 { font-size: 34px; }
  .mobile-nav.is-open {
    display: block; border-top: 1px solid var(--gray-200); background: #fff;
  }
  .mobile-nav .container { padding-top: 8px; padding-bottom: 16px; }
  .mobile-nav a {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 4px; font-size: 16px; font-weight: var(--fw-medium); color: var(--gray-800);
    border-bottom: 1px solid var(--gray-100);
  }
  .mobile-nav .ic { width: 18px; height: 18px; color: var(--gray-300); }
}
@media (max-width: 680px) {
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }
  .section--tight { padding: 60px 0; }
  .pain-grid, .package-grid, .why-grid, .steps-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 72px; }
  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 17px; }
  .section-title { font-size: 28px; }
  .cta-band h2 { font-size: 28px; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-cta .btn, .cta-actions .btn { flex: 1 1 auto; }
  /* QR chip drops into normal card flow so it can't be clipped */
  .qr-chip {
    position: static; right: auto; top: auto; margin-top: 16px; width: 100%;
  }
  /* header CTA shrinks to QR-icon only, 44px touch target */
  .header-actions .btn--primary { padding: 0; min-width: 44px; min-height: 44px; }
  .header-actions .btn--primary .cta-label { display: none; }
  .pain-grid, .why-grid { gap: 16px; }
  .pain-quote { font-size: 21px; }
  .why-grid { display: flex; flex-direction: column; }
  /* sub-page components */
  .page-hero { padding: 56px 0 48px; }
  .page-hero h1 { font-size: 32px; }
  .step-row { grid-template-columns: 1fr; gap: 18px; padding: 26px; }
  .step-row-num { flex-direction: row; gap: 14px; align-items: center; }
  .price-card { padding: 36px 26px; }
  .station-hero-card .map-ph { height: 240px; }
  .contact-actions .btn, .expand-card .btn { flex: 1 1 auto; }
  .checklist { padding: 8px 22px; }
  .walk-body h3 { font-size: 24px; }
}