:root {
  --brand: #ff6a00;
  --brand2: #ff9a3c;
  --brand-soft: #fff3e8;
  --brand-glow: rgba(255, 106, 0, 0.32);
  --ink: #1f2430;
  --ink2: #4a5163;
  --ink3: #7b8396;
  --bg: #ffffff;
  --bg2: #f6f7fb;
  --bg3: #eef1f8;
  --line: #e6e8f0;
  --glass: rgba(255, 255, 255, 0.62);
  --glass-strong: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(255, 255, 255, 0.7);
  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow: 0 6px 24px rgba(31, 36, 48, 0.08);
  --shadow-lg: 0 18px 48px rgba(31, 36, 48, 0.14);
  --shadow-brand: 0 10px 30px rgba(255, 106, 0, 0.28);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --speed: 0.32s;
  --maxw: 1200px;
  --header-h: 66px;
  --grad-hero: linear-gradient(135deg, #fff3e8 0%, #ffe6d1 46%, #ffd9b8 72%, #ffcfa4 100%);
  --grad-brand: linear-gradient(135deg, #ff6a00 0%, #ff9a3c 100%);
  --grad-cool: linear-gradient(135deg, #2b3a67 0%, #4a5fa8 100%);
  --grad-mint: linear-gradient(135deg, #1f8a70 0%, #39b593 100%);
}

body.dark {
  --ink: #e8eaf2;
  --ink2: #a9b0c3;
  --ink3: #7d8598;
  --bg: #12141a;
  --bg2: #1a1d26;
  --bg3: #222632;
  --line: #2a2f3d;
  --brand-soft: #2a1c10;
  --glass: rgba(26, 29, 38, 0.62);
  --glass-strong: rgba(26, 29, 38, 0.86);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
  --grad-hero: linear-gradient(135deg, #2a1c10 0%, #3a2410 46%, #4a2a10 72%, #5a3212 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color var(--speed) var(--ease), opacity var(--speed) var(--ease);
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 6px;
}

img,
svg,
video {
  max-width: 100%;
  display: block;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.2px;
}

p {
  color: var(--ink2);
}

::selection {
  background: var(--brand);
  color: #fff;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
}

.skip:focus {
  left: 12px;
  top: 12px;
  background: var(--brand);
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
  box-shadow: var(--shadow-brand);
}

header.site {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-strong);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--line);
  transition: background-color var(--speed) var(--ease), border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

header.site::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-glow), transparent);
  opacity: 0.7;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  height: var(--header-h);
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: var(--ink);
  letter-spacing: -0.3px;
  flex-shrink: 0;
  transition: transform var(--speed) var(--ease);
}

.logo:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.logo svg {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(255, 106, 0, 0.35);
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.logo:hover svg {
  transform: rotate(-6deg) scale(1.06);
  box-shadow: 0 10px 22px rgba(255, 106, 0, 0.45);
}

.logo span {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}

.nav ul a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--ink2);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  white-space: nowrap;
  transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.nav ul a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--speed) var(--ease);
}

.nav ul a:hover {
  background: var(--bg2);
  color: var(--brand);
  text-decoration: none;
  transform: translateY(-1px);
}

.nav ul a:hover::after {
  transform: scaleX(1);
}

.tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.search {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 4px 6px 4px 14px;
  background: var(--bg2);
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

.search:focus-within {
  border-color: var(--brand);
  background: var(--bg);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.12);
}

.search input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--ink);
  width: 130px;
  font-size: 14px;
  font-family: inherit;
}

.search input::placeholder {
  color: var(--ink3);
}

.search input::-webkit-search-cancel-button {
  cursor: pointer;
}

.search button {
  border: none;
  background: var(--grad-brand);
  color: #fff;
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  font-weight: 600;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), filter var(--speed) var(--ease);
}

.search button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-brand);
  filter: brightness(1.05);
}

.search button:active {
  transform: translateY(0) scale(0.97);
}

.iconbtn {
  border: 1px solid var(--line);
  background: var(--bg2);
  color: var(--ink);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  display: grid;
  place-items: center;
  transition: transform var(--speed) var(--ease), background-color var(--speed) var(--ease), border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.iconbtn:hover {
  transform: translateY(-2px) rotate(8deg);
  border-color: var(--brand);
  color: var(--brand);
  box-shadow: 0 8px 20px rgba(255, 106, 0, 0.18);
}

.iconbtn:active {
  transform: scale(0.94);
}

.menubtn {
  display: none;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 56px;
  background: var(--grad-hero);
  isolation: isolate;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: -1;
}

.hero::before {
  width: 520px;
  height: 520px;
  top: -220px;
  right: -120px;
  background: radial-gradient(circle at center, rgba(255, 106, 0, 0.38), transparent 68%);
  animation: floatBlob 16s ease-in-out infinite;
}

.hero::after {
  width: 420px;
  height: 420px;
  bottom: -200px;
  left: -100px;
  background: radial-gradient(circle at center, rgba(255, 154, 60, 0.34), transparent 68%);
  animation: floatBlob 20s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-24px, 28px, 0) scale(1.08); }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.badge {
  display: inline-block;
  background: var(--grad-brand);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  box-shadow: var(--shadow-brand);
  letter-spacing: 0.2px;
  animation: badgeIn 0.7s var(--ease) both;
}

@keyframes badgeIn {
  from { opacity: 0; transform: translateY(-10px) scale(0.94); }
  to { opacity: 1; transform: none; }
}

h1 {
  font-size: 40px;
  line-height: 1.28;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
  animation: fadeUp 0.8s var(--ease) both;
}

h1 .hl {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  position: relative;
}

.lead {
  font-size: 17px;
  color: var(--ink2);
  margin-bottom: 22px;
  max-width: 640px;
  animation: fadeUp 0.8s 0.08s var(--ease) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

.cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.16s var(--ease) both;
}

.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), background-color var(--speed) var(--ease), color var(--speed) var(--ease);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.35) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.7s var(--ease);
}

.btn:hover::after {
  transform: translateX(120%);
}

.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(255, 106, 0, 0.4);
  text-decoration: none;
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-ghost {
  background: var(--glass);
  border: 1.5px solid var(--brand);
  color: var(--brand);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: var(--brand);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-brand);
  text-decoration: none;
}

.btn-ghost:active {
  transform: translateY(0) scale(0.98);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 30px;
  animation: fadeUp 0.8s 0.24s var(--ease) both;
}

.stat {
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  backdrop-filter: blur(12px) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.stat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand);
}

.stat b {
  display: block;
  font-size: 24px;
  font-weight: 800;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
}

.stat span {
  font-size: 13px;
  color: var(--ink2);
}

.carousel {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg2);
  border: 1px solid var(--glass-border);
  animation: fadeUp 0.9s 0.2s var(--ease) both;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.carousel:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 60px rgba(31, 36, 48, 0.2);
}

.slides {
  position: relative;
  height: 320px;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  display: grid;
  place-items: center;
  padding: 20px;
  pointer-events: none;
}

.slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

.slide svg {
  width: 100%;
  height: 100%;
  border-radius: 12px;
}

.dots {
  position: absolute;
  bottom: 12px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 8px;
  z-index: 2;
}

.dots button {
  width: 9px;
  height: 9px;
  border-radius: var(--radius-pill);
  border: none;
  background: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  padding: 0;
  transition: width var(--speed) var(--ease), background-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.dots button:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: scale(1.2);
}

.dots button.on {
  background: var(--brand);
  width: 22px;
  box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.25);
}

.breadcrumb {
  font-size: 13px;
  color: var(--ink2);
  padding: 0 0 18px;
}

.breadcrumb ol {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb a {
  color: var(--ink2);
}

.breadcrumb a:hover {
  color: var(--brand);
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--ink3);
}

.breadcrumb li[aria-current="page"] {
  color: var(--brand);
  font-weight: 600;
}

.anchor-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
  animation: fadeUp 0.8s 0.32s var(--ease) both;
}

.anchor-nav a {
  font-size: 13px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--ink2);
  background: var(--glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease), transform var(--speed) var(--ease), background-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.anchor-nav a:hover {
  color: var(--brand);
  border-color: var(--brand);
  background: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(255, 106, 0, 0.16);
  text-decoration: none;
}

section {
  padding: 56px 0;
  position: relative;
}

section:nth-of-type(even) {
  background: var(--bg2);
}

.sec-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 40px;
}

.sec-head h2 {
  font-size: 30px;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}

.sec-head h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: var(--grad-brand);
  box-shadow: 0 4px 12px var(--brand-glow);
}

.sec-head p {
  color: var(--ink2);
  font-size: 16px;
}

.grid {
  display: grid;
  gap: 22px;
}

.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  position: relative;
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  overflow: hidden;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), border-color var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

body.dark .card {
  background: rgba(34, 38, 50, 0.6);
  border-color: rgba(255, 255, 255, 0.06);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.45s var(--ease);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 106, 0, 0.4);
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  transition: color var(--speed) var(--ease);
}

.card:hover h3 {
  color: var(--brand);
}

.card h4 {
  font-size: 15px;
  margin: 12px 0 6px;
  color: var(--brand);
}

.card p {
  color: var(--ink2);
  font-size: 15px;
}

.card p + p {
  margin-top: 10px;
}

.card svg {
  width: 46px;
  height: 46px;
  margin-bottom: 12px;
  border-radius: 12px;
  transition: transform var(--speed) var(--ease);
}

.card:hover svg {
  transform: scale(1.08) rotate(-4deg);
}

.card ul {
  list-style: none;
  font-size: 15px;
}

.card ul li {
  padding: 6px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--ink2);
  transition: color var(--speed) var(--ease), padding-left var(--speed) var(--ease);
}

.card ul li:last-child {
  border-bottom: none;
}

.card ul li:hover {
  color: var(--brand);
  padding-left: 4px;
}

.card ul li a {
  color: inherit;
}

.card ul li a:hover {
  color: var(--brand);
  text-decoration: none;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.article {
  position: relative;
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

body.dark .article {
  background: rgba(34, 38, 50, 0.6);
  border-color: rgba(255, 255, 255, 0.06);
}

.article::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle at center, var(--brand-glow), transparent 70%);
  opacity: 0;
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

.article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 106, 0, 0.4);
}

.article:hover::after {
  opacity: 1;
  transform: scale(1.4);
}

.article .meta {
  font-size: 13px;
  color: var(--ink3);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.article .meta::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.15);
}

.article h3 {
  font-size: 18px;
  margin-bottom: 10px;
  transition: color var(--speed) var(--ease);
}

.article:hover h3 {
  color: var(--brand);
}

.article p {
  color: var(--ink2);
  font-size: 15px;
  flex: 1;
}

.article a {
  font-weight: 600;
  margin-top: 14px;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  position: relative;
  z-index: 1;
}

.article a::after {
  content: "→";
  transition: transform var(--speed) var(--ease);
}

.article a:hover {
  text-decoration: none;
}

.article a:hover::after {
  transform: translateX(4px);
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

body.dark .faq-item {
  background: rgba(34, 38, 50, 0.55);
}

.faq-item:hover {
  border-color: rgba(255, 106, 0, 0.35);
}

.faq-item.open {
  border-color: var(--brand);
  box-shadow: 0 10px 28px rgba(255, 106, 0, 0.12);
}

.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  transition: color var(--speed) var(--ease);
}

.faq-q:hover {
  color: var(--brand);
}

.faq-q .plus {
  color: var(--brand);
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--brand-soft);
  transition: transform 0.35s var(--ease), background-color var(--speed) var(--ease);
}

.faq-item.open .plus {
  transform: rotate(45deg);
  background: var(--brand);
  color: #fff;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease), padding 0.4s var(--ease);
  padding: 0 20px;
}

.faq-item.open .faq-a {
  max-height: 900px;
  padding: 0 20px 18px;
}

.faq-a p {
  color: var(--ink2);
  font-size: 15px;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

.howto-step {
  display: flex;
  gap: 18px;
  margin-bottom: 22px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.howto-step:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
  border-color: rgba(255, 106, 0, 0.35);
}

.step-no {
  flex: 0 0 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 8px 20px rgba(255, 106, 0, 0.3);
  transition: transform var(--speed) var(--ease);
}

.howto-step:hover .step-no {
  transform: scale(1.08) rotate(-6deg);
}

.howto-step > div {
  flex: 1;
  min-width: 0;
}

.howto-step div h4 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--ink);
}

.howto-step div p {
  color: var(--ink2);
  font-size: 15px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.contact-box {
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

body.dark .contact-box {
  background: rgba(34, 38, 50, 0.6);
  border-color: rgba(255, 255, 255, 0.06);
}

.contact-box:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 106, 0, 0.35);
}

.contact-box h3 {
  margin-bottom: 14px;
  font-size: 19px;
  position: relative;
  padding-left: 14px;
}

.contact-box h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 18px;
  border-radius: 4px;
  background: var(--grad-brand);
}

.contact-box ul {
  list-style: none;
}

.contact-box li {
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
  color: var(--ink2);
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  transition: color var(--speed) var(--ease);
}

.contact-box li:hover {
  color: var(--ink);
}

.contact-box li:last-child {
  border-bottom: none;
}

.contact-box li b {
  color: var(--ink);
  display: inline-block;
  min-width: 88px;
  font-weight: 600;
}

form.contact-form label {
  display: block;
  font-size: 14px;
  color: var(--ink2);
  margin-bottom: 6px;
  font-weight: 500;
}

form.contact-form input,
form.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
  margin-bottom: 12px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

form.contact-form input::placeholder,
form.contact-form textarea::placeholder {
  color: var(--ink3);
}

form.contact-form input:focus,
form.contact-form textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.12);
}

form.contact-form textarea {
  min-height: 110px;
  resize: vertical;
}

form.contact-form .btn {
  width: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 14px;
  border-radius: 10px;
  overflow: hidden;
}

th,
td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}

th {
  background: var(--bg3);
  font-weight: 600;
  color: var(--ink);
}

td {
  color: var(--ink2);
}

tbody tr {
  transition: background-color var(--speed) var(--ease);
}

tbody tr:hover {
  background: var(--brand-soft);
}

blockquote {
  border-left: 4px solid var(--brand);
  background: var(--bg2);
  padding: 14px 18px;
  border-radius: 0 10px 10px 0;
  color: var(--ink2);
  margin: 14px 0;
  font-size: 15px;
  position: relative;
  transition: transform var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

blockquote:hover {
  transform: translateX(4px);
  background: var(--brand-soft);
}

.notice {
  background: var(--brand-soft);
  border: 1px solid rgba(255, 154, 60, 0.45);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 14px;
  color: #8a4b12;
  margin: 16px 0;
  position: relative;
  padding-left: 48px;
  transition: box-shadow var(--speed) var(--ease);
}

.notice::before {
  content: "!";
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.notice:hover {
  box-shadow: 0 8px 22px rgba(255, 106, 0, 0.16);
}

body.dark .notice {
  background: #2a1c10;
  border-color: #4a2a10;
  color: #ffb877;
}

footer.site {
  background: #161a22;
  color: #b6bccb;
  padding: 50px 0 24px;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

footer.site::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-brand);
}

footer.site a {
  color: #cfd4e0;
  transition: color var(--speed) var(--ease), padding-left var(--speed) var(--ease);
}

footer.site a:hover {
  color: var(--brand2);
  text-decoration: none;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 34px;
}

.foot-grid h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 14px;
  position: relative;
  padding-bottom: 8px;
}

.foot-grid h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
}

.foot-grid ul {
  list-style: none;
}

.foot-grid li {
  padding: 5px 0;
}

.foot-grid li a:hover {
  padding-left: 4px;
}

.foot-grid p {
  color: #b6bccb;
  line-height: 1.9;
}

.foot-bottom {
  border-top: 1px solid #2a2f3d;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #8b93a5;
}

.foot-bottom p {
  color: #8b93a5;
  margin-bottom: 4px;
}

.backtop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  border: none;
  font-size: 20px;
  cursor: pointer;
  display: none;
  z-index: 200;
  box-shadow: var(--shadow-brand);
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), opacity var(--speed) var(--ease);
}

.backtop.show {
  display: grid;
  place-items: center;
  animation: backIn 0.35s var(--ease);
}

@keyframes backIn {
  from { opacity: 0; transform: translateY(14px) scale(0.8); }
  to { opacity: 1; transform: none; }
}

.backtop:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 16px 36px rgba(255, 106, 0, 0.45);
}

.backtop:active {
  transform: scale(0.94);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 980px) {
  :root {
    --header-h: 62px;
  }
  .hero {
    padding: 36px 0 44px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  h1 {
    font-size: 30px;
  }
  .lead {
    font-size: 16px;
  }
  .g3,
  .g4,
  .g2,
  .article-grid,
  .contact-grid,
  .foot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .nav ul {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--glass-strong);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    backdrop-filter: blur(18px) saturate(180%);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 18px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    gap: 2px;
    animation: navDrop 0.3s var(--ease);
  }
  @keyframes navDrop {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: none; }
  }
  .nav ul.open {
    display: flex;
  }
  .nav ul a {
    padding: 11px 14px;
    font-size: 15px;
    border-radius: 10px;
  }
  .nav ul a::after {
    display: none;
  }
  .menubtn {
    display: grid;
    margin-left: auto;
  }
  .search input {
    width: 90px;
  }
  .slides {
    height: 280px;
  }
  .sec-head h2 {
    font-size: 25px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }
  .wrap {
    padding: 0 16px;
  }
  .g3,
  .g4,
  .g2,
  .article-grid,
  .contact-grid,
  .foot-grid {
    grid-template-columns: 1fr;
  }
  .stats {
    grid-template-columns: 1fr;
  }
  .slides {
    height: 220px;
  }
  h1 {
    font-size: 26px;
    letter-spacing: -0.4px;
  }
  section {
    padding: 40px 0;
  }
  .search {
    display: none;
  }
  .logo {
    font-size: 17px;
  }
  .logo svg {
    width: 30px;
    height: 30px;
  }
  .btn {
    padding: 11px 20px;
    font-size: 14px;
  }
  .cta {
    gap: 10px;
  }
  .cta .btn {
    flex: 1;
    text-align: center;
  }
  .card,
  .article,
  .contact-box {
    padding: 20px;
  }
  .howto-step {
    padding: 14px;
    gap: 14px;
  }
  .step-no {
    flex-basis: 38px;
    height: 38px;
    font-size: 16px;
  }
  .faq-q {
    padding: 15px 16px;
    font-size: 15px;
  }
  .backtop {
    right: 14px;
    bottom: 14px;
    width: 42px;
    height: 42px;
  }
  .foot-bottom {
    flex-direction: column;
  }
  .contact-box li b {
    min-width: 76px;
  }
}

@media (max-width: 380px) {
  h1 {
    font-size: 23px;
  }
  .badge {
    font-size: 12px;
    padding: 4px 11px;
  }
  .stat b {
    font-size: 21px;
  }
}

@media print {
  header.site,
  .backtop,
  .carousel,
  .cta,
  .tools,
  .dots {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}