/* ==========================================================================
   易答 AI - 静态落地页样式
   ========================================================================== */

:root {
  --color-navy-darker: #0D1730;
  --color-navy-dark: #12204A;
  --color-navy: #1B2A5E;
  --color-navy-light: #2C3E7C;
  --color-mint: #2FE6A6;
  --color-mint-dark: #14B885;
  --color-mint-tint: #E4FBF3;
  --color-coral: #FF6B5D;

  --color-bg: #F5F7FB;
  --color-surface: #FFFFFF;
  --color-text: #1B2233;
  --color-text-muted: #4B5568;
  --color-text-on-dark: #F3F6FC;
  --color-text-on-dark-muted: #C4CDE6;
  --color-border: #E1E6F0;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;

  --shadow-card: 0 12px 32px -18px rgba(17, 28, 61, 0.28);
  --shadow-panel: 0 30px 70px -25px rgba(10, 18, 41, 0.55);

  --container-width: 1160px;

  --font-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* -------------------------------------------------------------------------
   Reset
   ------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, ul, ol, figure {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

section[id] {
  scroll-margin-top: 84px;
}

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

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-mint);
  color: var(--color-navy-darker);
  padding: 12px 20px;
  font-weight: 700;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 999;
}

.skip-link:focus {
  left: 0;
}

/* Focus visibility (accessibility) */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--color-mint-dark);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* -------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 700;
  border: 2px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-mint);
  color: var(--color-navy-darker);
  box-shadow: 0 14px 30px -14px rgba(47, 230, 166, 0.65);
}

.btn-primary:hover {
  background: var(--color-mint-dark);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-outline:hover {
  background: var(--color-navy);
  color: var(--color-text-on-dark);
  transform: translateY(-2px);
}

.btn-small {
  padding: 10px 20px;
  font-size: 0.9rem;
}

.btn-large {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* -------------------------------------------------------------------------
   Header / Nav
   ------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-navy);
  margin-right: auto;
}

.logo-mark {
  letter-spacing: 0.02em;
}

.logo-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-mint);
  align-self: center;
}

.logo-sub {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-mint-dark);
  border: 1.5px solid var(--color-mint-dark);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  position: relative;
  padding: 6px 2px;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--color-mint-dark);
  transition: right 0.2s ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  right: 0;
}

.header-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-navy);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* -------------------------------------------------------------------------
   Section shared
   ------------------------------------------------------------------------- */
main section {
  padding: 96px 0;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--color-mint-dark);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  color: var(--color-navy);
  font-weight: 800;
  line-height: 1.35;
}

.section-desc {
  margin-top: 14px;
  color: var(--color-text-muted);
  font-size: 1.02rem;
}

[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* -------------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: 88px;
  padding-bottom: 96px;
  background: var(--color-navy-darker);
  color: var(--color-text-on-dark);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(150deg, var(--color-navy-darker) 10%, var(--color-navy) 55%, var(--color-navy-light) 100%);
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 30% 20%, black, transparent 70%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-content .eyebrow {
  color: var(--color-mint);
}

.hero-headline {
  font-size: clamp(2.1rem, 4.2vw, 3rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 22px;
  color: #FFFFFF;
}

.hero-subheadline {
  font-size: 1.08rem;
  color: var(--color-text-on-dark-muted);
  max-width: 52ch;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero .btn-outline {
  color: var(--color-text-on-dark);
  border-color: rgba(255, 255, 255, 0.55);
}

.hero .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
}

/* Hero visual: chat panel */
.hero-visual {
  position: relative;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blob {
  position: absolute;
  border-radius: 42% 58% 65% 35% / 45% 45% 55% 55%;
  filter: blur(50px);
  opacity: 0.55;
  z-index: 0;
}

.blob-1 {
  width: 260px;
  height: 260px;
  background: var(--color-mint);
  top: -30px;
  right: 10px;
  opacity: 0.35;
}

.blob-2 {
  width: 220px;
  height: 220px;
  background: var(--color-coral);
  bottom: -20px;
  left: 0;
  opacity: 0.22;
}

.chat-panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.chat-panel-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 18px;
  background: #EEF1F8;
  border-bottom: 1px solid var(--color-border);
}

.chat-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-border);
}

.chat-dot-1 { background: var(--color-coral); }
.chat-dot-2 { background: #F4C542; }
.chat-dot-3 { background: var(--color-mint-dark); }

.chat-title {
  margin-left: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text-muted);
}

.chat-body {
  padding: 20px 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.bubble {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  max-width: 88%;
}

.bubble p {
  font-size: 0.92rem;
  line-height: 1.5;
  padding: 10px 14px;
  border-radius: var(--radius-md);
}

.bubble-ai {
  align-self: flex-start;
}

.bubble-ai p {
  background: #EEF1F8;
  color: var(--color-text);
  border-bottom-left-radius: 4px;
}

.bubble-me {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.bubble-me p {
  background: var(--color-mint);
  color: var(--color-navy-darker);
  border-bottom-right-radius: 4px;
  font-weight: 600;
}

.avatar {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  font-weight: 800;
}

.avatar-ai {
  background: var(--color-navy);
  color: #FFFFFF;
}

.avatar-me {
  background: var(--color-navy-darker);
  color: var(--color-mint);
  border: 1.5px solid var(--color-mint);
}

.bubble-typing {
  align-items: center;
}

.typing-dots {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--color-mint);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border-bottom-right-radius: 4px;
}

.typing-dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-navy-darker);
  display: inline-block;
  animation: typing-bounce 1.2s infinite ease-in-out;
}

.typing-dots i:nth-child(2) { animation-delay: 0.15s; }
.typing-dots i:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* -------------------------------------------------------------------------
   Features
   ------------------------------------------------------------------------- */
.features {
  background: var(--color-surface);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: var(--shadow-card);
}

.feature-card h3 {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--color-navy);
  margin: 20px 0 10px;
  line-height: 1.4;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.feature-icon {
  position: relative;
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--color-navy);
}

/* icon 1: overlapping chat bubbles (真实场景对练) */
.icon-scenario::before,
.icon-scenario::after {
  content: "";
  position: absolute;
  border-radius: 6px 6px 6px 2px;
}

.icon-scenario::before {
  width: 22px;
  height: 16px;
  background: var(--color-mint);
  top: 12px;
  left: 8px;
}

.icon-scenario::after {
  width: 16px;
  height: 12px;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 6px 6px 2px 6px;
  bottom: 10px;
  right: 8px;
}

/* icon 2: 24/7 clock (AI 随时在线) */
.icon-online::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.9);
}

.icon-online::after {
  content: "";
  position: absolute;
  top: 22px;
  left: 25px;
  width: 9px;
  height: 3px;
  background: var(--color-mint);
  border-radius: 2px;
  transform-origin: left center;
  transform: rotate(-35deg);
}

/* icon 3: feedback bubble with check (即时反馈) */
.icon-feedback::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 10px;
  width: 32px;
  height: 24px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 8px 8px 8px 2px;
}

.icon-feedback::after {
  content: "";
  position: absolute;
  top: 20px;
  left: 18px;
  width: 14px;
  height: 8px;
  border-left: 3px solid var(--color-mint-dark);
  border-bottom: 3px solid var(--color-mint-dark);
  transform: rotate(-45deg);
}

/* icon 4: target path (个性化路径) */
.icon-path {
  background: radial-gradient(circle at center, transparent 0 8px, var(--color-navy) 8px);
}

.icon-path::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 34px;
  height: 34px;
  border: 3px solid rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.icon-path::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  background: var(--color-mint);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

/* icon 5: calm face (低压力环境) */
.icon-calm::before,
.icon-calm::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  top: 18px;
}

.icon-calm::before {
  left: 15px;
}

.icon-calm::after {
  right: 15px;
}

.icon-calm .icon-mouth {
  position: absolute;
  bottom: 12px;
  left: 50%;
  width: 20px;
  height: 10px;
  border-bottom: 3px solid var(--color-mint);
  border-radius: 0 0 12px 12px;
  transform: translateX(-50%);
}

/* icon 6: ascending bar chart (学习轨迹) */
.icon-track {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
  padding-bottom: 10px;
}

.icon-track i {
  display: block;
  width: 7px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.9);
}

.icon-track i:nth-child(1) { height: 14px; }
.icon-track i:nth-child(2) { height: 22px; background: var(--color-mint); }
.icon-track i:nth-child(3) { height: 30px; }

/* -------------------------------------------------------------------------
   Scenario library
   ------------------------------------------------------------------------- */
.scenarios {
  background: var(--color-bg);
}

.scenario-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.scenario-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-navy);
  transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.scenario-chip:hover {
  border-color: var(--color-mint-dark);
  background: var(--color-mint-tint);
  transform: translateY(-2px);
}

.chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-mint-dark);
}

/* -------------------------------------------------------------------------
   How it works
   ------------------------------------------------------------------------- */
.how-it-works {
  background: var(--color-surface);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 30px 22px 26px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.step::after {
  content: "";
  position: absolute;
  top: 46px;
  right: -13px;
  width: 26px;
  height: 2px;
  background: var(--color-border);
}

.step:last-child::after {
  display: none;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-navy);
  color: var(--color-mint);
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 18px;
}

.step h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 10px;
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

/* -------------------------------------------------------------------------
   Personas
   ------------------------------------------------------------------------- */
.personas {
  background: var(--color-bg);
}

.persona-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.persona-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  box-shadow: var(--shadow-card);
  text-align: center;
}

.persona-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-navy), var(--color-navy-light));
  color: var(--color-mint);
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 18px;
}

.persona-card h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 10px;
}

.persona-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-align: left;
}

/* -------------------------------------------------------------------------
   CTA + contact
   ------------------------------------------------------------------------- */
.cta-section {
  background: linear-gradient(160deg, var(--color-navy-darker), var(--color-navy) 65%, var(--color-navy-light));
  color: var(--color-text-on-dark);
}

.cta-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}

.cta-text h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.cta-text p {
  color: var(--color-text-on-dark-muted);
  font-size: 1.05rem;
  margin-bottom: 28px;
  max-width: 48ch;
}

.contact-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
}

.contact-card h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 18px;
}

.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.92rem;
}

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

.contact-label {
  color: var(--color-mint);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.contact-value {
  color: var(--color-text-on-dark-muted);
  word-break: break-word;
}

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-navy-darker);
  color: var(--color-text-on-dark-muted);
  padding-top: 48px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand .logo-mark,
.footer-brand .logo-sub {
  color: #FFFFFF;
  font-weight: 800;
}

.footer-brand .logo-sub {
  margin-left: 6px;
  font-size: 0.75rem;
  border: 1.5px solid var(--color-mint);
  color: var(--color-mint);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
}

.footer-brand p {
  margin-top: 12px;
  font-size: 0.9rem;
  max-width: 32ch;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 28px;
}

.footer-nav a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-on-dark-muted);
}

.footer-nav a:hover {
  color: var(--color-mint);
}

.footer-bottom {
  padding: 20px 24px 28px;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(196, 205, 230, 0.7);
}

/* ==========================================================================
   Responsive breakpoints
   ========================================================================== */

@media (max-width: 768px) {
  main section {
    padding: 72px 0;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    box-shadow: 0 16px 30px -20px rgba(17, 28, 61, 0.35);
  }

  .main-nav.is-open {
    max-height: 420px;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 18px;
  }

  .main-nav li {
    width: 100%;
  }

  .main-nav a {
    display: block;
    padding: 14px 0;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

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

  .hero-visual {
    order: -1;
    min-height: auto;
    margin-bottom: 12px;
  }

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

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

  .step::after {
    display: none;
  }

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

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

  .cta-text p {
    max-width: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }

  main section {
    padding: 56px 0;
  }

  .logo {
    font-size: 1.1rem;
  }

  .hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .hero-headline {
    font-size: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .chat-panel {
    max-width: 100%;
  }

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

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

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

  .persona-card p {
    text-align: left;
  }

  .scenario-chip {
    padding: 10px 16px;
    font-size: 0.88rem;
  }

  .footer-inner {
    flex-direction: column;
  }
}