:root {
  color-scheme: light;
  --ink: #050509;
  --ink-soft: #1a1c28;
  --muted: #666874;
  --muted-soft: #9ca0ac;
  --line: #e5e7ef;
  --line-soft: #eef0f5;
  --paper: #ffffff;
  --bg: #fafbff;
  --bg-soft: #f5f5ff;
  --purple: #4f46e5;
  --purple-dark: #332cd4;
  --purple-soft: #ede9fe;
  --blue: #2563eb;
  --blue-soft: #dbeafe;
  --cyan: #28e5ff;
  --mint: #00f5a0;
  --green: #16a34a;
  --green-soft: #dcfce7;
  --navy: #0a0c1a;
  --footer-bg: #0e0f1c;
  --footer-line: #1f2032;
  --footer-muted: #8a8d9f;
  --shadow-soft: 0 8px 24px rgba(15, 16, 30, 0.04);
  --shadow-card: 0 14px 34px rgba(15, 16, 30, 0.06);
  --shadow-elevated: 0 24px 64px rgba(51, 44, 212, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 34px;
  align-items: center;
  min-height: 78px;
  padding: 0 clamp(24px, 6vw, 120px);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line-soft);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 110px;
  height: auto;
  display: block;
}

.brand-sub {
  display: none;
  font-size: 12.96px;
  color: var(--muted);
  font-weight: 600;
  line-height: 1.3;
  max-width: 220px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

@media (min-width: 1100px) {
  .brand-sub {
    display: inline-block;
  }
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 2.6vw, 38px);
  font-size: 12.6px;
  font-weight: 600;
  color: var(--ink-soft);
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 180ms ease;
}

.site-nav a:hover {
  color: var(--purple);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 70px;
  height: 32px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8f9fc;
  color: var(--muted);
}

.lang-toggle span {
  display: grid;
  place-items: center;
  border-radius: 6px;
  font-size: 9.9px;
  font-weight: 800;
}

body[data-lang="zh"] .lang-toggle span:first-child,
body[data-lang="en"] .lang-toggle span:last-child {
  color: var(--ink);
  background: #fff;
  box-shadow: 0 4px 12px rgba(5, 5, 9, 0.08);
}

.cta-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font-size: 12.6px;
  font-weight: 700;
}

.cta-outline::before {
  content: "✓";
  color: var(--purple);
  font-size: 10.8px;
  font-weight: 900;
}

.signup-link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 10px;
  background: var(--purple);
  color: #fff;
  font-size: 12.6px;
  font-weight: 700;
  transition: background 180ms ease;
}

.signup-link:hover {
  background: var(--purple-dark);
}

/* ===== Hero (居中) ===== */
.hero-centered {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px 24px;
  text-align: center;
}

.hero-title {
  margin: 0 0 32px;
  font-size: clamp(48.6px, 7.2vw, 108px);
  font-weight: 900;
  line-height: 0.96;
  letter-spacing: -0.025em;
  color: var(--navy);
}

.h1-line {
  display: block;
}

.hero-subtitle {
  display: inline-flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 32px;
  font-size: clamp(23.4px, 2.88vw, 37.8px);
  font-weight: 800;
  color: var(--purple);
  letter-spacing: -0.01em;
}

.typed-cursor {
  display: inline-block;
  width: 3px;
  height: 0.95em;
  margin-left: 2px;
  background: var(--purple);
  vertical-align: middle;
  animation: blink 1s steps(2) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.hero-lede {
  max-width: 720px;
  margin: 0 auto 40px;
  font-size: 16.2px;
  line-height: 1.75;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  margin-bottom: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 58px;
  padding: 0 36px;
  border-radius: 999px;
  font-size: 14.4px;
  font-weight: 800;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: #fff;
  background: var(--purple);
  box-shadow: 0 18px 34px rgba(79, 70, 229, 0.32);
}

.button-primary:hover {
  background: var(--purple-dark);
}

.button .arrow {
  font-size: 18px;
  line-height: 1;
}

.hero-sub-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 36px;
  color: var(--muted);
  font-size: 12.6px;
  font-weight: 600;
}

.hero-sub-action .arrow {
  font-size: 12.6px;
  color: var(--muted-soft);
}

.pro-tag {
  display: inline-grid;
  place-items: center;
  height: 22px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--purple-soft);
  color: var(--purple);
  font-size: 9.9px;
  font-weight: 800;
}

.hero-social-proof {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  color: var(--ink-soft);
  font-size: 12.6px;
  font-weight: 600;
}

.avatar-stack {
  display: inline-flex;
}

.avatar-stack .avatar {
  width: 30px;
  height: 30px;
  margin-left: -8px;
  border: 2px solid #fff;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 10.8px;
  font-weight: 800;
}

.avatar-stack .avatar:first-child {
  margin-left: 0;
}

.avatar.a1 {
  background: linear-gradient(135deg, #f87171, #ef4444);
}

.avatar.a2 {
  background: linear-gradient(135deg, #60a5fa, #2563eb);
}

.avatar.a3 {
  background: linear-gradient(135deg, #34d399, #10b981);
}

.social-proof-text strong {
  color: var(--ink);
  font-weight: 800;
}

.hero-support {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--muted);
  font-size: 11.7px;
}

.green-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--green);
}

/* ===== Trust band ===== */
.trust-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px 16px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 32px;
}

.trust-divider {
  width: 1px;
  height: 38px;
  background: var(--line);
}

.trust-icon {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--purple-soft);
  flex-shrink: 0;
}

.trust-icon.shield::before {
  content: "";
  width: 16px;
  height: 20px;
  border: 2.5px solid var(--purple);
  border-radius: 4px 4px 50% 50%;
  border-top-width: 3px;
}

.trust-icon.bolt::before {
  content: "";
  width: 8px;
  height: 18px;
  background: var(--purple);
  clip-path: polygon(60% 0, 0 55%, 40% 55%, 20% 100%, 100% 38%, 50% 38%);
  transform: scaleX(1.6);
}

.trust-icon.card::before {
  content: "";
  width: 22px;
  height: 16px;
  border: 2.5px solid var(--purple);
  border-radius: 4px;
  background:
    linear-gradient(var(--purple), var(--purple)) center 2px / 100% 3px no-repeat;
}

.trust-item strong {
  display: block;
  font-size: 12.6px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 4px;
}

.trust-item small {
  display: block;
  color: var(--muted);
  font-size: 11.25px;
  line-height: 1.4;
}

/* ===== Scroll hint ===== */
.scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin: 28px auto 70px;
}

.scroll-pill {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 11.7px;
  font-weight: 700;
}

.scroll-arrow {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border-radius: 999px;
  border: 1px solid var(--blue-soft);
  background: #fff;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.1);
}

.scroll-arrow span {
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(45deg) translate(-3px, -3px);
}

/* ===== Section common ===== */
.section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 90px 24px;
}

.section-head {
  margin-bottom: 50px;
}

.section-head.center {
  text-align: center;
}

.section-head h2 {
  margin: 14px 0 16px;
  font-size: clamp(32.4px, 3.6vw, 50.4px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--navy);
  letter-spacing: -0.015em;
}

.section-head h2 .accent {
  color: var(--purple);
}

.section-head > p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 14.4px;
  line-height: 1.75;
  color: var(--muted);
}

.section-head > p a {
  color: var(--purple);
  font-weight: 700;
  border-bottom: 1px solid currentColor;
}

.kicker-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--purple-soft);
  color: var(--purple);
  font-size: 11.7px;
  font-weight: 700;
}

.kicker-tag-blue {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--blue);
  font-size: 12.6px;
  font-weight: 700;
}

/* ===== Advantages (4 cards) ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.advantage-card {
  padding: 32px 28px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-soft);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.advantage-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.ad-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 22px;
  border-radius: 12px;
}

.ad-icon.check {
  background: var(--green-soft);
}

.ad-icon.check::before {
  content: "✓";
  color: var(--green);
  font-size: 19.8px;
  font-weight: 900;
  line-height: 1;
}

.ad-icon.mail {
  background: var(--purple-soft);
}

.ad-icon.mail::before {
  content: "";
  width: 22px;
  height: 16px;
  border: 2px solid var(--purple);
  border-radius: 3px;
  background:
    linear-gradient(45deg, transparent 48%, var(--purple) 48% 52%, transparent 52%) 0 0 / 50% 100% no-repeat,
    linear-gradient(-45deg, transparent 48%, var(--purple) 48% 52%, transparent 52%) 100% 0 / 50% 100% no-repeat;
}

.ad-icon.shield {
  background: var(--purple-soft);
}

.ad-icon.shield::before {
  content: "";
  width: 18px;
  height: 22px;
  border: 2.5px solid var(--purple);
  border-radius: 4px 4px 50% 50%;
  border-top-width: 3px;
}

.ad-icon.users {
  background: var(--blue-soft);
}

.ad-icon.users::before {
  content: "";
  width: 26px;
  height: 12px;
  border: 2.5px solid var(--blue);
  border-bottom: 0;
  border-radius: 16px 16px 0 0;
  margin-top: 14px;
}

.ad-icon.users::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 2.5px solid var(--blue);
  border-radius: 999px;
  top: 8px;
}

.advantage-card h3 {
  margin: 0 0 12px;
  font-size: 16.2px;
  font-weight: 800;
  color: var(--ink);
}

.advantage-card p {
  margin: 0;
  font-size: 13.05px;
  line-height: 1.75;
  color: var(--muted);
}

/* ===== Workflow ===== */
.workflow-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 72px;
  align-items: center;
}

.workflow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.workflow-steps .step {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 18px;
  align-items: start;
  padding: 6px 0;
}

.step-num {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  border: 2px solid var(--line);
  background: #fff;
  color: var(--muted-soft);
  font-size: 11.7px;
  font-weight: 800;
}

.step.completed .step-num {
  border-color: var(--ink);
  color: var(--ink);
}

.step strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16.2px;
  font-weight: 800;
  color: var(--ink);
}

.step.muted strong {
  color: var(--muted);
}

.step p {
  margin: 0;
  font-size: 13.05px;
  line-height: 1.7;
  color: var(--muted);
}

.workflow-preview {
  position: relative;
  padding: 30px 30px 40px;
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow-card);
}

.preview-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 0 16px;
}

.track-step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted-soft);
  font-size: 9.9px;
  font-weight: 800;
  white-space: nowrap;
}

.track-step::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 2px solid var(--line);
  background: #fff;
}

.track-step.done {
  color: var(--blue);
}

.track-step.done::before {
  border-color: var(--blue);
  background: var(--blue);
  box-shadow: inset 0 0 0 3px #fff;
}

.track-line {
  flex-shrink: 0;
  width: 28px;
  height: 1px;
  background: var(--line);
}

.preview-title {
  text-align: center;
  font-size: 15.3px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 4px;
}

.preview-sub {
  text-align: center;
  font-size: 10.8px;
  color: var(--muted-soft);
  margin-bottom: 22px;
}

/* builder shell (邮件示意) */
.builder-shell {
  position: relative;
  z-index: 2;
  margin: 0 auto;
  max-width: 460px;
  padding: 0 24px 26px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line-soft);
}

.builder-toolbar {
  position: absolute;
  top: -22px;
  left: 28px;
  display: flex;
  gap: 4px;
}

.builder-toolbar span {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: #fff;
  border: 1px solid var(--line-soft);
}

.builder-top {
  display: grid;
  height: 78px;
  margin-top: 18px;
  place-items: center;
  border: 3px solid #21d7ff;
  border-radius: 8px;
  background: var(--purple);
}

.builder-top img {
  width: 46px;
  height: auto;
}

.creator-banner {
  position: relative;
  display: flex;
  height: 82px;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding: 18px 22px;
  overflow: hidden;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(33, 215, 255, 0.24), rgba(79, 70, 229, 0.12)),
    #eef9fb;
}

.creator-banner::after {
  position: absolute;
  right: -40px;
  top: -80px;
  width: 180px;
  height: 180px;
  border-radius: 999px;
  background: rgba(79, 70, 229, 0.14);
  content: "";
}

.banner-lines {
  display: grid;
  gap: 10px;
  width: 68%;
}

.banner-lines span {
  height: 11px;
  border-radius: 999px;
  background: rgba(6, 16, 40, 0.16);
}

.banner-lines span:nth-child(2) {
  width: 62%;
}

.creator-avatar {
  position: relative;
  z-index: 1;
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  color: #fff;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--cyan), var(--mint));
  font-size: 19.8px;
  font-weight: 900;
}

.message-card {
  padding: 22px 0 0;
  text-align: center;
}

.message-card strong {
  display: block;
  margin-bottom: 10px;
  color: #00aeb4;
  font-size: 13.5px;
}

.message-card h3 {
  max-width: 320px;
  margin: 0 auto 10px;
  font-size: 17.1px;
  line-height: 1.3;
  font-weight: 800;
  color: var(--ink);
}

.message-card p {
  max-width: 320px;
  margin: 0 auto 20px;
  color: #777985;
  font-size: 12.6px;
  line-height: 1.65;
}

.intent-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 340px;
  min-height: 66px;
  margin: 0 auto;
  padding: 0 22px;
  border: 2px dashed #d7d9e8;
  border-radius: 10px;
  background: #fafbff;
}

.intent-box span {
  color: var(--muted);
  font-weight: 700;
  font-size: 12.6px;
}

.intent-box strong {
  margin: 0;
  color: var(--purple);
  font-size: 19.8px;
}

.tool-card {
  position: absolute;
  z-index: 4;
  right: 6px;
  bottom: 30px;
  display: grid;
  width: 150px;
  min-height: 130px;
  place-items: center;
  padding: 16px;
  border: 1px solid #dedff1;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 18px 44px rgba(79, 70, 229, 0.18);
}

.tool-card > span {
  width: 60px;
  height: 40px;
  border-radius: 6px;
  background:
    linear-gradient(90deg, #9d8df6 0 60%, transparent 60%),
    linear-gradient(#9d8df6, #9d8df6);
  background-size:
    100% 100%,
    48px 7px;
  background-position:
    center,
    center 18px;
  background-repeat: no-repeat;
}

.tool-card strong {
  color: var(--purple);
  font-size: 11.25px;
  font-weight: 800;
}

/* ===== Testimonials ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.testimonial-card {
  padding: 28px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.testimonial-card .stars {
  color: #f59e0b;
  font-size: 14.4px;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.testimonial-card > p {
  margin: 0 0 22px;
  font-size: 13.05px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.author {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
}

.author .avatar {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 12.6px;
  font-weight: 800;
}

.author strong {
  display: block;
  font-size: 12.6px;
  font-weight: 800;
}

.author small {
  display: block;
  font-size: 10.8px;
  color: var(--muted);
}

.tag-chip {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 9.9px;
  font-weight: 800;
  white-space: nowrap;
}

.tag-purple {
  background: var(--purple-soft);
  color: var(--purple);
}

.tag-green {
  background: #dcfce7;
  color: #16a34a;
}

.tag-yellow {
  background: #fef3c7;
  color: #d97706;
}

.tag-pink {
  background: #fce7f3;
  color: #db2777;
}

.tag-rose {
  background: #ffe4e6;
  color: #e11d48;
}

.tag-cyan {
  background: #cffafe;
  color: #0891b2;
}

.avatar.a-blue {
  background: linear-gradient(135deg, #60a5fa, #2563eb);
}

.avatar.a-green {
  background: linear-gradient(135deg, #34d399, #10b981);
}

.avatar.a-orange {
  background: linear-gradient(135deg, #fb923c, #ea580c);
}

.avatar.a-purple {
  background: linear-gradient(135deg, #a78bfa, #7c3aed);
}

.avatar.a-pink {
  background: linear-gradient(135deg, #f472b6, #ec4899);
}

.avatar.a-red {
  background: linear-gradient(135deg, #f87171, #ef4444);
}

/* ===== FAQ ===== */
.faq-search {
  position: relative;
  max-width: 880px;
  margin: 0 auto 28px;
}

.faq-search input {
  width: 100%;
  height: 60px;
  padding: 0 22px 0 56px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  font-size: 13.5px;
  color: var(--ink);
  outline: none;
  font-family: inherit;
}

.faq-search input:focus {
  border-color: var(--purple);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.search-icon {
  position: absolute;
  left: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border: 2.5px solid var(--muted);
  border-radius: 999px;
}

.search-icon::after {
  content: "";
  position: absolute;
  right: -7px;
  bottom: -6px;
  width: 9px;
  height: 2.5px;
  background: var(--muted);
  border-radius: 999px;
  transform: rotate(45deg);
}

.faq-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 880px;
  margin: 0 auto 32px;
}

.tab-btn {
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-soft);
  font-size: 12.6px;
  font-weight: 700;
  transition:
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.tab-btn.active {
  background: var(--purple);
  border-color: var(--purple);
  color: #fff;
}

.tab-btn:hover:not(.active) {
  background: var(--bg-soft);
}

.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
  transition: box-shadow 180ms ease;
}

.faq-list details[open] {
  box-shadow: var(--shadow-soft);
  border-color: var(--purple-soft);
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "";
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  margin-left: 18px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 200ms ease;
}

.faq-list details[open] summary::after {
  transform: rotate(-135deg) translate(2px, 2px);
  border-color: var(--purple);
}

.faq-answer {
  padding: 0 26px 22px;
}

.faq-answer p {
  margin: 0;
  font-size: 13.05px;
  line-height: 1.75;
  color: var(--muted);
}

.faq-bottom {
  text-align: center;
  margin-top: 32px;
  color: var(--muted);
  font-size: 12.6px;
}

.faq-bottom a {
  color: var(--purple);
  font-weight: 700;
  margin-left: 6px;
}

/* ===== CTA ===== */
.cta-section {
  max-width: 920px;
  margin: 0 auto;
  padding: 70px 24px 110px;
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 16px;
  font-size: clamp(28.8px, 2.88vw, 41.4px);
  font-weight: 900;
  color: var(--navy);
}

.cta-section p {
  max-width: 600px;
  margin: 0 auto 30px;
  color: var(--muted);
  font-size: 14.4px;
  line-height: 1.75;
}

/* ===== Dark Footer ===== */
.site-footer-dark {
  padding: 70px clamp(24px, 6vw, 120px) 30px;
  background: var(--footer-bg);
  color: var(--footer-muted);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto 50px;
}

.footer-brand .footer-logo img {
  height: 32px;
  margin-bottom: 22px;
}

.footer-brand-desc {
  max-width: 340px;
  margin: 0 0 28px;
  font-size: 12.15px;
  line-height: 1.7;
}

.footer-contact-block small {
  display: block;
  margin-bottom: 6px;
  font-size: 10.8px;
  color: var(--footer-muted);
}

.footer-contact-block strong {
  display: block;
  color: #fff;
  font-size: 12.6px;
  font-weight: 700;
}

.footer-col h4 {
  margin: 0 0 16px;
  font-size: 12.6px;
  font-weight: 800;
  color: #fff;
}

.footer-col a {
  display: block;
  margin-bottom: 10px;
  font-size: 12.15px;
  color: var(--footer-muted);
  transition: color 180ms ease;
  cursor: pointer;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 30px;
  border-top: 1px solid var(--footer-line);
  font-size: 11.25px;
}

.footer-bottom-links {
  display: flex;
  gap: 22px;
}

.footer-bottom-links a:hover {
  color: #fff;
}

/* ===== Responsive ===== */
@media (max-width: 1180px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .workflow-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
    gap: 18px;
    padding: 14px 20px;
  }

  .site-nav {
    display: none;
  }

  .cta-outline {
    display: none;
  }

  .brand-sub {
    display: none;
  }
}

@media (max-width: 760px) {
  .hero-centered {
    padding: 50px 18px 20px;
  }

  .hero-title {
    font-size: 39.6px;
  }

  .hero-subtitle {
    font-size: 19.8px;
  }

  .hero-lede {
    font-size: 13.5px;
  }

  .button {
    min-height: 54px;
    padding: 0 26px;
  }

  .trust-band {
    flex-direction: column;
    gap: 18px;
    padding: 32px 18px;
  }

  .trust-divider {
    display: none;
  }

  .trust-item {
    width: 100%;
    max-width: 320px;
    padding: 0;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 14px;
  }

  .section {
    padding: 60px 18px;
  }
}