/* =============================================
   探九洲官方网站 · 全局样式
   ============================================= */
:root {
  --clr-primary: #22B99A;
  --clr-primary-dark: #116B57;
  --clr-primary-light: #EAFBF6;
  --clr-red: #E85B4A;
  --clr-bg: #F5F9F7;
  --clr-surface: #ffffff;
  --clr-text: #17231F;
  --clr-muted: #6B7D77;
  --clr-border: #DCE8E3;
  --shadow-sm: 0 2px 12px rgba(22,80,62,.06);
  --shadow-md: 0 8px 32px rgba(22,80,62,.10);
  --shadow-lg: 0 20px 60px rgba(22,80,62,.14);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --nav-h: 72px;
  --ease: 220ms cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.7;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; font: inherit; border: none; background: none; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container { width: min(1200px,100%); margin-inline: auto; padding-inline: clamp(20px,5vw,80px); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── Header / Navigation ─────────────────────── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h); display: flex; align-items: center;
  color: #fff; background: transparent; border-bottom: 1px solid transparent;
  transition: color var(--ease), background var(--ease), border-color var(--ease), box-shadow var(--ease), backdrop-filter var(--ease);
}
.site-header.scrolled,
.site-header.menu-open {
  color: var(--clr-text); background: rgba(255,255,255,.94);
  backdrop-filter: blur(16px); border-color: rgba(220,232,227,.85); box-shadow: var(--shadow-sm);
}
.nav-inner { display: flex; align-items: center; width: 100%; gap: 0; }
.nav-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 40px; height: 40px; flex-shrink: 0; border-radius: 50%; object-fit: cover; display: block;
  box-shadow: 0 0 0 2px rgba(255,255,255,.72), 0 3px 12px rgba(0,0,0,.14);
  transition: box-shadow var(--ease);
}
.site-header.scrolled .logo-mark,
.site-header.menu-open .logo-mark { box-shadow: none; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-cn { font-size: 18px; font-weight: 800; color: currentColor; letter-spacing: 1px; }
.logo-en { font-size: 9.5px; font-weight: 500; color: currentColor; opacity: .68; letter-spacing: 2.5px; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 2px; margin-left: auto; margin-right: 22px; }
.nav-links a {
  padding: 7px 11px; border-radius: 8px; font-size: 13.5px; color: currentColor; opacity: .82;
  transition: color var(--ease), background var(--ease), opacity var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: currentColor; opacity: 1; background: rgba(255,255,255,.14); }
.site-header.scrolled .nav-links a:hover,
.site-header.scrolled .nav-links a.active,
.site-header.menu-open .nav-links a:hover,
.site-header.menu-open .nav-links a.active { color: var(--clr-primary-dark); background: var(--clr-primary-light); }
.nav-cta {
  padding: 9px 22px; border-radius: 999px; font-size: 14px; font-weight: 700;
  color: #fff; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.42);
  transition: background var(--ease), transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.nav-cta:hover { background: rgba(255,255,255,.26); transform: translateY(-1px); box-shadow: 0 4px 18px rgba(0,0,0,.14); }
.site-header.scrolled .nav-cta,
.site-header.menu-open .nav-cta { background: var(--clr-primary); border-color: var(--clr-primary); }
.site-header.scrolled .nav-cta:hover,
.site-header.menu-open .nav-cta:hover { background: var(--clr-primary-dark); box-shadow: 0 4px 16px rgba(34,185,154,.35); }
.nav-toggle { display: none; width: 40px; height: 40px; border-radius: 10px; align-items: center; justify-content: center; color: currentColor; margin-left: auto; }
.nav-toggle:hover { background: rgba(255,255,255,.14); }
.site-header.scrolled .nav-toggle:hover,
.site-header.menu-open .nav-toggle:hover { background: var(--clr-primary-light); }
.nav-toggle svg { width: 20px; height: 20px; }

:where(a, button):focus-visible { outline: 3px solid rgba(127,221,204,.95); outline-offset: 4px; }
.site-header.scrolled :where(a, button):focus-visible,
.site-header.menu-open :where(a, button):focus-visible { outline-color: var(--clr-primary); }

/* ── Hero ─────────────────────────────────────── */
#hero {
  min-height: 100svh; display: flex; align-items: center;
  color: #fff; background-color: #173b29;
  background-image: url('../images/hero/hero-family-desktop.jpg');
  background-repeat: no-repeat; background-size: cover; background-position: 50% 48%;
  overflow: hidden; position: relative;
}
@supports (background-image: image-set(url('') type('image/webp'))) {
  #hero {
    background-image: image-set(
      url('../images/hero/hero-family-desktop.webp') type('image/webp'),
      url('../images/hero/hero-family-desktop.jpg') type('image/jpeg')
    );
  }
}
#hero::before {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(7,32,22,.82) 0%, rgba(10,46,31,.68) 34%, rgba(10,42,29,.28) 60%, rgba(7,28,20,.10) 100%),
    linear-gradient(180deg, rgba(5,24,17,.40) 0%, transparent 28%, transparent 65%, rgba(5,24,17,.48) 100%);
  pointer-events: none;
}
#hero::after {
  content: ''; position: absolute; inset: auto 0 0; height: 28%;
  background: linear-gradient(180deg, transparent, rgba(6,30,21,.32)); pointer-events: none;
}
.hero-inner {
  display: flex; align-items: center; min-height: 100svh;
  padding-top: calc(var(--nav-h) + 70px); padding-bottom: 120px;
  position: relative; z-index: 1;
}
.hero-content { width: min(690px, 62%); }
.hero-tag {
  display: inline-flex; align-items: center; gap: 9px; padding: 7px 15px; border-radius: 999px;
  color: rgba(255,255,255,.92); background: rgba(5,31,21,.26); border: 1px solid rgba(255,255,255,.24);
  backdrop-filter: blur(8px); font-size: 13px; font-weight: 600; letter-spacing: .8px; margin-bottom: 26px;
}
.hero-tag::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: #65E0C3; box-shadow: 0 0 0 5px rgba(101,224,195,.13); }
.hero-title {
  color: #fff; font-size: clamp(48px,6.2vw,84px); font-weight: 900; line-height: 1.12;
  letter-spacing: -2px; margin-bottom: 24px; text-shadow: 0 3px 24px rgba(0,0,0,.22);
}
.hero-title em { color: #8BE6D1; font-style: normal; }
.hero-sub { font-size: 18px; color: rgba(255,255,255,.82); max-width: 520px; margin-bottom: 38px; line-height: 1.85; text-shadow: 0 2px 12px rgba(0,0,0,.2); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary, .btn-secondary {
  min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-size: 15px; font-weight: 700;
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease);
}
.btn-primary { background: var(--clr-primary); color: #fff; box-shadow: 0 10px 28px rgba(4,35,24,.24); }
.btn-primary:hover { background: #1EC5A2; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(4,35,24,.32); }
.btn-secondary { color: #fff; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.52); backdrop-filter: blur(8px); }
.btn-secondary:hover { background: rgba(255,255,255,.22); border-color: rgba(255,255,255,.78); transform: translateY(-1px); }
.hero-scroll {
  position: absolute; z-index: 2; left: 50%; bottom: 22px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  color: rgba(255,255,255,.78); font-size: 11px; letter-spacing: .12em;
}
.hero-scroll svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; animation: heroScroll 1.8s ease-in-out infinite; }
@keyframes heroScroll { 0%,100% { transform: translateY(0); opacity: .65; } 50% { transform: translateY(7px); opacity: 1; } }

/* ── Platform experience ──────────────────────── */
.experience-section { background: linear-gradient(145deg, #F8FBF9 0%, #EDF8F4 100%); overflow: hidden; }
.experience-inner { display: grid; grid-template-columns: minmax(300px,.82fr) minmax(420px,1.18fr); align-items: center; gap: clamp(60px,9vw,130px); }
.experience-visual {
  min-width: 0; margin: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  position: relative; isolation: isolate;
}
.experience-visual::before {
  content: ''; position: absolute; z-index: -2; width: min(470px,120%); aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, rgba(34,185,154,.18) 0%, rgba(34,185,154,.07) 55%, transparent 72%);
}
.experience-visual::after {
  content: ''; position: absolute; z-index: -1; left: 50%; bottom: 30px; width: 220px; height: 26px;
  border-radius: 50%; background: rgba(15,45,36,.13); filter: blur(10px); transform: translateX(-50%);
}
.experience-device {
  position: relative; width: clamp(226px,22vw,270px); padding: 19px 8px 10px;
  border: 1px solid rgba(9,53,43,.72); border-radius: 34px; background: linear-gradient(150deg,#102D26,#061B17);
  box-shadow: 0 32px 75px rgba(14,68,54,.22), 0 8px 24px rgba(14,68,54,.14), inset 0 1px 0 rgba(255,255,255,.16);
}
.experience-device::after { content: ''; position: absolute; inset: 2px; border-radius: 31px; border: 1px solid rgba(255,255,255,.07); pointer-events: none; }
.experience-device-speaker { position: absolute; top: 7px; left: 50%; width: 40px; height: 4px; border-radius: 999px; background: rgba(255,255,255,.2); transform: translateX(-50%); }
.experience-device picture { display: block; }
.experience-device img { display: block; width: 100%; height: auto; border-radius: 24px; background: #fff; }
.experience-visual figcaption { margin-top: 18px; color: var(--clr-muted); font-size: 12px; letter-spacing: .08em; }
.experience-content .section-eyebrow { margin-bottom: 16px; }
.experience-content .section-title { margin-bottom: 18px; }
.experience-lead { color: var(--clr-muted); font-size: 16px; line-height: 1.85; max-width: 620px; margin-bottom: 30px; }
.experience-list { display: grid; gap: 18px; margin-bottom: 30px; }
.experience-item { display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start; }
.experience-item > span { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; color: var(--clr-primary-dark); background: #DDF6EE; font-size: 12px; font-weight: 800; }
.experience-item h3 { font-size: 16px; font-weight: 800; margin-bottom: 4px; }
.experience-item p { color: var(--clr-muted); font-size: 13.5px; line-height: 1.65; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--clr-primary-dark); font-size: 14px; font-weight: 800; }
.text-link span { transition: transform var(--ease); }
.text-link:hover span { transform: translateX(4px); }

/* ── Section commons ─────────────────────────── */
.section { padding-block: 90px; }
.section-bg-mint { background: var(--clr-primary-light); }
.section-bg-dark { background: var(--clr-primary-dark); color: #fff; }
.section-bg-dark .section-sub { color: rgba(255,255,255,.7); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--clr-primary); margin-bottom: 14px;
}
.section-eyebrow::before, .section-eyebrow::after {
  content: ''; height: 1px; width: 24px; background: currentColor; opacity: .5;
}
.section-title { font-size: clamp(26px,4vw,42px); font-weight: 800; line-height: 1.3; margin-bottom: 14px; }
.section-sub { font-size: 16px; color: var(--clr-muted); max-width: 560px; margin-inline: auto; }
.section-bg-dark .section-eyebrow { color: #7FDDCC; }
.section-bg-dark .section-title { color: #fff; }

/* ── Cards grid ──────────────────────────────── */
.cards-5 { display: grid; grid-template-columns: repeat(5,1fr); gap: 18px; }
.cards-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.cards-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 26px; }
.card {
  background: var(--clr-surface); border-radius: var(--radius-md);
  border: 1px solid var(--clr-border); padding: 28px 22px;
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--clr-primary); }
.card-icon { width: 52px; height: 52px; border-radius: var(--radius-sm); display: grid; place-items: center; margin-bottom: 18px; }
.card-icon svg { width: 26px; height: 26px; }
.card-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.card-desc { font-size: 13.5px; color: var(--clr-muted); line-height: 1.6; }

/* ── Category cards ──────────────────────────── */
.cat-card {
  --icon-color: var(--clr-primary-dark);
  --icon-bg: rgba(255,255,255,.62);
  background: #fff; border-radius: var(--radius-md); overflow: hidden;
  border: 1px solid var(--clr-border);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--icon-color) 32%, var(--clr-border)); }
.cat-visual { height: 130px; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.cat-icon-shell {
  width: 58px; height: 58px; border-radius: 18px; display: grid; place-items: center;
  color: var(--icon-color); background: var(--icon-bg);
  border: 1px solid rgba(255,255,255,.78);
  box-shadow: 0 10px 28px rgba(27,62,51,.08), inset 0 1px 0 rgba(255,255,255,.9);
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease);
}
.cat-card:hover .cat-icon-shell { transform: translateY(-3px) scale(1.04); background: rgba(255,255,255,.82); box-shadow: 0 14px 34px rgba(27,62,51,.13), inset 0 1px 0 #fff; }
.cat-icon-shell svg { width: 29px; height: 29px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.cat-card--green { --icon-color: #0B8F76; --icon-bg: rgba(255,255,255,.58); }
.cat-card--green .cat-visual { background: linear-gradient(145deg,#E8FAF5,#C8F2E6); }
.cat-card--orange { --icon-color: #D9782A; --icon-bg: rgba(255,255,255,.58); }
.cat-card--orange .cat-visual { background: linear-gradient(145deg,#FFF7ED,#FFE5CA); }
.cat-card--violet { --icon-color: #6455D8; --icon-bg: rgba(255,255,255,.58); }
.cat-card--violet .cat-visual { background: linear-gradient(145deg,#F3F1FF,#DDD9FA); }
.cat-card--gold { --icon-color: #B77A08; --icon-bg: rgba(255,255,255,.58); }
.cat-card--gold .cat-visual { background: linear-gradient(145deg,#FFF8E8,#FFE8BA); }
.cat-card--teal { --icon-color: #087865; --icon-bg: rgba(255,255,255,.58); }
.cat-card--teal .cat-visual { background: linear-gradient(145deg,#E8F7F4,#CDECE5); }
.cat-body { padding: 16px 18px; }
.cat-name { font-size: 15px; font-weight: 700; margin-bottom: 5px; }
.cat-hint { font-size: 12.5px; color: var(--clr-muted); }

/* ── Service tiles (5-grid) ──────────────────── */
.svc-card {
  --icon-color: var(--clr-primary);
  --icon-bg: var(--clr-primary-light);
  text-align: center; padding: 36px 24px; border-radius: var(--radius-md);
  background: #fff; border: 1px solid var(--clr-border);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease); cursor: default;
}
.svc-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--icon-color) 28%, var(--clr-border)); }
.svc-icon {
  width: 62px; height: 62px; border-radius: 19px; display: grid; place-items: center;
  margin: 0 auto 20px; color: var(--icon-color); background: var(--icon-bg);
  border: 1px solid color-mix(in srgb, var(--icon-color) 12%, transparent);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.85), 0 9px 24px rgba(27,62,51,.07);
  transition: transform var(--ease), box-shadow var(--ease);
}
.svc-card:hover .svc-icon { transform: translateY(-3px) rotate(-2deg); box-shadow: inset 0 1px 0 rgba(255,255,255,.9), 0 13px 30px rgba(27,62,51,.12); }
.svc-icon svg { width: 29px; height: 29px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.svc-card--coral { --icon-color: #D85B4B; --icon-bg: #FFF0ED; }
.svc-card--orange { --icon-color: #D8782F; --icon-bg: #FFF3E9; }
.svc-card--green { --icon-color: #0A9D80; --icon-bg: #EAF9F5; }
.svc-card--blue { --icon-color: #3F83C5; --icon-bg: #EDF6FF; }
.svc-card--gold { --icon-color: #B78408; --icon-bg: #FFF9E9; }
.svc-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.svc-desc { font-size: 13px; color: var(--clr-muted); line-height: 1.65; }

/* ── Quality columns ─────────────────────────── */
.quality-col { text-align: center; padding: 10px; }
.quality-num { font-size: 48px; font-weight: 900; color: #7FDDCC; line-height: 1; margin-bottom: 12px; }
.quality-label { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.quality-text { font-size: 13.5px; color: rgba(255,255,255,.65); line-height: 1.65; }
.quality-divider { width: 1px; background: rgba(255,255,255,.15); align-self: stretch; margin-block: 10px; }

/* ── Membership ──────────────────────────────── */
.mem-card { background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--clr-border); padding: 32px 26px; position: relative; overflow: hidden; transition: transform var(--ease), box-shadow var(--ease); }
.mem-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.mem-card::after { content: ''; position: absolute; top: -30px; right: -30px; width: 100px; height: 100px; border-radius: 50%; background: var(--clr-primary-light); opacity: .6; pointer-events: none; }
.mem-icon { font-size: 34px; margin-bottom: 16px; }
.mem-title { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.mem-text { font-size: 13.5px; color: var(--clr-muted); }

/* ── Live / Discover split ───────────────────── */
.live-split { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.live-phone { position: relative; width: fit-content; margin: 0 auto; }
.phone-frame { width: 220px; height: 400px; border-radius: 36px; background: #1c2820; padding: 12px; box-shadow: 0 24px 60px rgba(22,50,40,.35); }
.phone-screen { height: 100%; border-radius: 26px; background: linear-gradient(160deg, #1e3a2c 0%, #22B99A 100%); overflow: hidden; position: relative; }
.phone-card { background: rgba(255,255,255,.12); backdrop-filter: blur(8px); border-radius: 14px; padding: 12px; margin: 12px; }
.phone-live-badge { display: inline-flex; align-items: center; gap: 5px; background: var(--clr-red); border-radius: 999px; padding: 3px 10px; font-size: 10px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.phone-live-badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: #fff; }
.live-features { display: grid; gap: 22px; }
.live-feat { display: flex; gap: 18px; align-items: flex-start; }
.live-feat-icon { width: 46px; height: 46px; border-radius: 12px; background: var(--clr-primary-light); display: grid; place-items: center; flex-shrink: 0; }
.live-feat-icon svg { width: 22px; height: 22px; color: var(--clr-primary); }
.live-feat-title { font-size: 16px; font-weight: 700; margin-bottom: 5px; }
.live-feat-text { font-size: 13.5px; color: var(--clr-muted); }

/* ── Partners ─────────────────────────────────── */
.partners-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
.partner-step { position: relative; text-align: center; }
.partner-step:not(:last-child)::after {
  content: '';
  position: absolute;
  z-index: 0;
  top: 35px;
  left: calc(50% + 38px);
  width: calc(100% + 30px - 76px);
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), rgba(34,185,154,.2));
  pointer-events: none;
}
.partner-step-num {
  position: relative; z-index: 1;
  width: 72px; height: 72px; border-radius: 50%; background: #fff;
  border: 2px solid var(--clr-primary); color: var(--clr-primary-dark);
  font-size: 24px; font-weight: 900; display: grid; place-items: center;
  margin: 0 auto 20px; box-shadow: 0 4px 20px rgba(34,185,154,.2);
}
.partner-step-title { font-size: 17px; font-weight: 700; margin-bottom: 8px; color: var(--clr-primary-dark); }
.partner-step-text { font-size: 13.5px; color: var(--clr-muted); }
.partners-dirs { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; margin-bottom: 56px; }
.dir-card { background: #fff; border-radius: var(--radius-md); padding: 28px 24px; border: 1px solid var(--clr-border); transition: transform var(--ease), box-shadow var(--ease); }
.dir-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--clr-primary); }
.dir-icon { width: 48px; height: 48px; border-radius: 12px; background: var(--clr-primary-light); display: grid; place-items: center; margin-bottom: 16px; }
.dir-icon svg { width: 24px; height: 24px; color: var(--clr-primary); }
.dir-title { font-size: 16px; font-weight: 700; margin-bottom: 7px; }
.dir-text { font-size: 13.5px; color: var(--clr-muted); line-height: 1.65; }

/* ── Footer ───────────────────────────────────── */
.site-footer { background: var(--clr-primary-dark); color: rgba(255,255,255,.9); padding-block: 60px 32px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 50px; margin-bottom: 48px; }
.footer-brand .logo-cn { color: #fff; }
.footer-brand .logo-en { color: rgba(255,255,255,.5); }
.footer-tagline { font-size: 13.5px; color: rgba(255,255,255,.6); margin-top: 14px; line-height: 1.7; }
.footer-col-title { font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: rgba(255,255,255,.45); margin-bottom: 18px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { font-size: 13.5px; color: rgba(255,255,255,.7); transition: color var(--ease); }
.footer-links a:hover { color: #7FDDCC; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; font-size: 12.5px; color: rgba(255,255,255,.4); }

/* ── Toast notification ───────────────────────── */
#toast-container { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 500; display: flex; flex-direction: column; align-items: center; gap: 8px; pointer-events: none; }
.toast {
  padding: 12px 22px; border-radius: 999px;
  background: rgba(17,35,31,.92); color: #fff; font-size: 14px; font-weight: 500;
  box-shadow: 0 8px 30px rgba(0,0,0,.2); backdrop-filter: blur(8px);
  animation: toastIn .22s ease forwards;
}
@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(6px); } }

/* ── Back to top ──────────────────────────────── */
#back-top {
  position: fixed; right: 24px; bottom: 28px; z-index: 300;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--clr-primary); color: #fff;
  display: grid; place-items: center;
  box-shadow: 0 4px 18px rgba(34,185,154,.4);
  opacity: 0; pointer-events: none;
  transition: opacity var(--ease), transform var(--ease);
}
#back-top.visible { opacity: 1; pointer-events: auto; }
#back-top:hover { transform: translateY(-2px); background: var(--clr-primary-dark); }
#back-top svg { width: 18px; height: 18px; }

/* ── Mobile overlay ───────────────────────────── */
.nav-overlay { display: none; position: fixed; inset: 0; z-index: 90; background: rgba(17,35,31,.45); }
.nav-overlay.open { display: block; }
.mobile-menu {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 95;
  background: #fff; border-bottom: 1px solid var(--clr-border);
  padding: 16px 24px 24px; box-shadow: var(--shadow-md);
}
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 13px 0; border-bottom: 1px solid var(--clr-border); font-size: 16px; color: var(--clr-text); font-weight: 500; transition: color var(--ease); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--clr-primary); }
.mobile-cta { display: block; margin-top: 16px; text-align: center; padding: 14px; border-radius: 999px; background: var(--clr-primary); color: #fff; font-weight: 700; font-size: 15px; }

/* ── Scroll reveal ────────────────────────────── */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .5s ease, transform .5s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ───────────────────────────────── */
@media (max-width: 1100px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}
@media (max-width: 1024px) {
  #hero { background-position: 53% 48%; }
  .hero-content { width: min(620px, 68%); }
  .hero-title { font-size: clamp(48px,7vw,70px); }
  .experience-inner { grid-template-columns: minmax(260px,.8fr) minmax(380px,1.2fr); gap: 60px; }
  .experience-device { width: clamp(220px,24vw,248px); }
  .cards-5 { grid-template-columns: repeat(3,1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 768px) {
  #hero {
    min-height: 100svh;
    background-image: url('../images/hero/hero-family-mobile.jpg');
    background-position: 50% 43%;
  }
  @supports (background-image: image-set(url('') type('image/webp'))) {
    #hero {
      background-image: image-set(
        url('../images/hero/hero-family-mobile.webp') type('image/webp'),
        url('../images/hero/hero-family-mobile.jpg') type('image/jpeg')
      );
    }
  }
  #hero::before {
    background:
      linear-gradient(180deg, rgba(6,29,20,.55) 0%, rgba(7,33,23,.22) 32%, rgba(7,31,22,.18) 56%, rgba(5,26,18,.66) 100%),
      linear-gradient(90deg, rgba(7,34,23,.62) 0%, rgba(7,34,23,.25) 72%, rgba(7,34,23,.12) 100%);
  }
  .hero-inner { min-height: 100svh; padding-top: calc(var(--nav-h) + 56px); padding-bottom: 130px; align-items: flex-end; }
  .hero-content { width: min(560px,100%); }
  .hero-tag { margin-bottom: 18px; font-size: 12px; }
  .hero-title { font-size: clamp(40px,11vw,58px); letter-spacing: -1px; margin-bottom: 18px; }
  .hero-sub { max-width: 470px; margin-bottom: 28px; font-size: 16px; }
  .hero-scroll span { display: none; }
  .experience-inner { grid-template-columns: 1fr; gap: 52px; }
  .experience-content { order: 1; text-align: center; }
  .experience-content .section-eyebrow { justify-content: center; }
  .experience-lead { margin-inline: auto; }
  .experience-list { max-width: 560px; margin-inline: auto; text-align: left; }
  .experience-visual { order: 2; }
  .experience-device { width: min(238px,68vw); }
  .cards-5, .cards-4, .cards-3 { grid-template-columns: repeat(2,1fr); }
  .partners-dirs { grid-template-columns: 1fr; }
  .partners-steps { grid-template-columns: 1fr; }
  .partner-step::after { display: none; }
  .live-split { grid-template-columns: 1fr; }
  .live-phone { display: none; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .section { padding-block: 60px; }
}
/* ── Brand philosophy section ─────────────────── */
.brand-section { background: linear-gradient(160deg, #0a4a3a 0%, #0e6050 50%, #116B57 100%); }
.brand-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.brand-item { padding: 26px; border: 1px solid rgba(255,255,255,.13); border-radius: var(--radius-md); background: rgba(255,255,255,.07); transition: background var(--ease), border-color var(--ease); }
.brand-item:hover { background: rgba(255,255,255,.13); border-color: rgba(255,255,255,.26); }
.brand-item-wide { grid-column: span 3; }
.brand-item-cat { font-size: 10px; font-weight: 700; letter-spacing: 2px; color: rgba(255,255,255,.4); text-transform: uppercase; margin-bottom: 6px; }
.brand-item-title { font-size: 18px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.brand-item-main { font-size: 16px; font-weight: 600; color: rgba(255,255,255,.92); line-height: 1.75; }
.brand-item-wide .brand-item-main { font-size: 18px; }
.brand-item-sub { font-size: 11px; color: rgba(255,255,255,.43); line-height: 1.65; margin-top: 8px; }
.mem-icon { margin-bottom: 18px; }
.mem-icon svg { width: 48px; height: 48px; display: block; }
@media (max-width: 1024px) { .brand-grid { grid-template-columns: repeat(2,1fr); } .brand-item-wide { grid-column: span 2; } }
@media (max-width: 768px) { .brand-grid { grid-template-columns: 1fr; } .brand-item-wide { grid-column: span 1; } }
@media (max-width: 480px) {
  :root { --nav-h: 66px; }
  .logo-mark { width: 36px; height: 36px; }
  .logo-cn { font-size: 16px; }
  .logo-en { font-size: 8px; letter-spacing: 2px; }
  #hero { background-position: 51% 42%; }
  .hero-inner { padding-top: calc(var(--nav-h) + 44px); padding-bottom: 112px; }
  .hero-title { font-size: clamp(37px,11.5vw,48px); line-height: 1.14; }
  .hero-sub { font-size: 15px; line-height: 1.75; }
  .hero-actions { width: 100%; gap: 10px; }
  .btn-primary, .btn-secondary { flex: 1 1 100%; min-height: 48px; }
  .hero-scroll { bottom: 16px; }
  .experience-device { width: min(218px,72vw); padding: 17px 6px 8px; border-radius: 29px; }
  .experience-device img { border-radius: 21px; }
  .experience-item { grid-template-columns: 40px 1fr; gap: 13px; }
  .experience-item > span { width: 38px; height: 38px; }
}
@media (max-width: 340px) {
  .hero-title { font-size: 36px; }
  .hero-tag { font-size: 11px; padding-inline: 12px; }
  .experience-device { width: 202px; }
}