/* ===== Base ===== */
:root {
  --blue-900: #061a33;
  --blue-800: #0a2547;
  --blue-700: #0e3a6b;
  --blue-600: #1257a6;
  --blue-500: #1b6fd6;
  --blue-400: #3d8ef0;
  --blue-300: #7db8ff;
  --blue-100: #e6f1ff;
  --cyan: #35d0ff;
  --text: #0d1b2a;
  --muted: #5a6b80;
  --text-muted: #5a6b80; /* 修复：补上未定义变量 */
  --danger: #ff5f5f;      /* 修复：补上未定义变量 */
  --line: #e3ecf6;
  --bg: #f5f9ff;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(10, 37, 71, 0.08);
  --shadow-lg: 0 20px 60px rgba(10, 37, 71, 0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Arabic font */
html[dir="rtl"] body { font-family: "Tahoma", "Arial", "Segoe UI", sans-serif; }

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container { width: min(1180px, 92%); margin: 0 auto; }

/* ===== 悬浮沟通栏 ===== */
.floating-contact {
  position: fixed; right: 20px; top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; gap: 12px; z-index: 999;
}

.float-btn {
  display: flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 50%; color: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2); transition: all 0.3s ease;
}
.float-btn:hover { transform: scale(1.1); box-shadow: 0 6px 16px rgba(0,0,0,0.3); }
.float-btn.whatsapp { background-color: #25D366; }
.float-btn.vk { background-color: #0077FF; }
.float-btn.telegram { background-color: #229ED9; }

html[dir="rtl"] .floating-contact { right: auto; left: 20px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.85rem 1.8rem; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  transition: all 0.25s ease; border: 1px solid transparent; cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--cyan));
  color: #fff; box-shadow: 0 8px 24px rgba(27, 111, 214, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(27, 111, 214, 0.45); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.12); color: #fff;
  border-color: rgba(255, 255, 255, 0.35); backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.2); }
.btn-block { width: 100%; }

/* ===== Header ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: all 0.3s ease; background: transparent;
}
.header.scrolled {
  background: rgba(6, 26, 51, 0.92); backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 1rem; }
.logo { display: flex; align-items: center; gap: 0.6rem; color: #fff; font-weight: 700; font-size: 1.05rem; letter-spacing: 0.5px; white-space: nowrap; }
.logo img { width: 64px; height: 64px; }

.nav { display: flex; gap: 1.5rem; }
.nav-link { color: rgba(255, 255, 255, 0.82); font-size: 0.95rem; font-weight: 500; position: relative; transition: color 0.2s; white-space: nowrap; }
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--cyan); border-radius: 2px; }

.lang-switch { display: flex; gap: 0.3rem; background: rgba(255, 255, 255, 0.1); border-radius: 999px; padding: 0.25rem; }
.lang-btn { background: none; border: none; color: rgba(255, 255, 255, 0.7); font-size: 0.78rem; font-weight: 600; padding: 0.35rem 0.7rem; border-radius: 999px; cursor: pointer; transition: all 0.2s; }
.lang-btn.active, .lang-btn:hover { background: var(--cyan); color: #061a33; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; }

/* ===== Hero ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; background: radial-gradient(circle at 20% 20%, #0e3a6b 0%, #061a33 55%, #030d1c 100%); overflow: hidden; padding: 120px 0 80px; }
.hero-bg { position: absolute; inset: 0; background: radial-gradient(circle at 80% 30%, rgba(53, 208, 255, 0.18), transparent 45%), radial-gradient(circle at 15% 85%, rgba(27, 111, 214, 0.22), transparent 50%); pointer-events: none; }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 3rem; align-items: center; }

.hero-tag { display: inline-block; color: var(--cyan); font-size: 0.85rem; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 1rem; border: 1px solid rgba(53, 208, 255, 0.4); padding: 0.3rem 0.9rem; border-radius: 999px; }
.hero h1 { color: #fff; font-size: clamp(1.8rem, 3.6vw, 3rem); line-height: 1.25; font-weight: 800; margin-bottom: 1.2rem; }
.hero h1 .accent { background: linear-gradient(135deg, var(--blue-300), var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-desc { color: rgba(255, 255, 255, 0.78); font-size: 1.05rem; max-width: 560px; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; list-style: none; }
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { color: #fff; font-size: 1.8rem; font-weight: 800; line-height: 1.1; }
.hero-stats span { color: rgba(255, 255, 255, 0.6); font-size: 0.8rem; }

.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.radar-container { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 400px; height: 400px; pointer-events: none; z-index: 1; }
.radar-circle { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); border-radius: 50%; border: 1px solid rgba(53, 208, 255, 0.2); }
.radar-circle:nth-child(1) { width: 200px; height: 200px; }
.radar-circle:nth-child(2) { width: 300px; height: 300px; }
.radar-circle:nth-child(3) { width: 400px; height: 400px; }
.radar-sweep { position: absolute; top: 50%; left: 50%; width: 400px; height: 400px; margin: -200px 0 0 -200px; border-radius: 50%; background: conic-gradient(from 0deg, rgba(53,208,255,0) 0deg, rgba(53,208,255,0) 270deg, rgba(53,208,255,0.4) 360deg); animation: sweep 4s linear infinite; }
@keyframes sweep { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.product-img { position: relative; z-index: 2; width: 100%; max-width: 560px; filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.5)); animation: float 6s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ===== Section ===== */
.section { padding: 100px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 4rem; }
.section-tag { color: var(--blue-500); font-size: 0.85rem; letter-spacing: 2px; text-transform: uppercase; font-weight: 700; margin-bottom: 0.8rem; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; color: var(--blue-900); margin-bottom: 0.8rem; }
.section-sub { color: var(--muted); font-size: 1rem; }

/* ===== Features ===== */
.features { background: var(--white); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.feature-card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem 1.5rem; transition: all 0.3s ease; }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--blue-300); }
.feature-icon { font-size: 1.8rem; margin-bottom: 1rem; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--blue-800); margin-bottom: 0.6rem; }
.feature-card p { color: var(--muted); font-size: 0.9rem; }

/* ===== Specs ===== */
.specs { background: var(--bg); }
.specs-layout { display: grid; grid-template-columns: 1.6fr 0.9fr; gap: 2rem; align-items: start; }
.specs-table { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.specs-table table { width: 100%; border-collapse: collapse; }
.specs-table th, .specs-table td { padding: 1rem 1.4rem; text-align: start; font-size: 0.92rem; border-bottom: 1px solid var(--line); }
.specs-table th { width: 34%; color: var(--blue-700); font-weight: 600; background: var(--blue-100); }
.specs-table td { color: var(--text); }
.specs-table tr:last-child th, .specs-table tr:last-child td { border-bottom: none; }
.specs-card { background: linear-gradient(160deg, var(--blue-700), var(--blue-900)); color: #fff; border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow-lg); position: sticky; top: 100px; }
.specs-card h3 { font-size: 1.15rem; margin-bottom: 1.2rem; font-weight: 700; }
.specs-card ul { list-style: none; margin-bottom: 1.8rem; }
.specs-card li { position: relative; padding-inline-start: 1.4rem; margin-bottom: 0.8rem; font-size: 0.92rem; color: rgba(255, 255, 255, 0.85); }
.specs-card li::before { content: ""; position: absolute; inset-inline-start: 0; top: 0.6em; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); }

/* ===== 痛点与卖点 UI 动效区 ===== */
.pain-points { background: var(--blue-900); }
.pain-points .section-head h2, .pain-points .section-head .section-sub { color: #fff; }
.pain-points .section-head .section-tag { color: var(--cyan); }

.pain-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }

.pain-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex; flex-direction: column; gap: 1.5rem;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative; overflow: hidden;
}
.pain-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 50% 0%, rgba(53, 208, 255, 0.15), transparent 70%);
  opacity: 0; transition: opacity 0.4s ease; pointer-events: none;
}
.pain-card:hover { transform: translateY(-8px); border-color: rgba(53, 208, 255, 0.4); box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(53, 208, 255, 0.1); }
.pain-card:hover::before { opacity: 1; }

.pain-header { display: flex; align-items: center; gap: 1rem; }
.pain-tag { background: rgba(255, 95, 95, 0.15); color: #ff7b7b; font-size: 0.75rem; font-weight: 700; padding: 0.2rem 0.6rem; border-radius: 4px; text-transform: uppercase; white-space: nowrap; }
.pain-card h3 { color: #fff; font-size: 1.15rem; font-weight: 700; }
.pain-desc { color: rgba(255, 255, 255, 0.6); font-size: 0.9rem; padding-bottom: 1rem; border-bottom: 1px dashed rgba(255, 255, 255, 0.1); }

.solution-box { background: rgba(53, 208, 255, 0.05); border-left: 3px solid var(--cyan); padding: 1rem; border-radius: 0 8px 8px 0; }
html[dir="rtl"] .solution-box { border-left: none; border-right: 3px solid var(--cyan); border-radius: 8px 0 0 8px; }
.solution-box strong { display: block; color: var(--cyan); font-size: 0.9rem; margin-bottom: 0.6rem; }
.solution-box ul { list-style: none; padding-left: 0; }
.solution-box li { color: rgba(255, 255, 255, 0.85); font-size: 0.88rem; margin-bottom: 0.4rem; padding-left: 1.2rem; position: relative; }
html[dir="rtl"] .solution-box li { padding-left: 0; padding-right: 1.2rem; }
.solution-box li::before { content: '✓'; position: absolute; left: 0; color: var(--cyan); font-weight: bold; }
html[dir="rtl"] .solution-box li::before { left: auto; right: 0; }

/* --- UI 动画组件库 --- */
.ui-anim-box { width: 100%; height: 140px; display: flex; justify-content: center; align-items: center; background: rgba(0, 0, 0, 0.2); border-radius: 8px; overflow: hidden; }

/* 痛点 1: 雷达防护圈 */
.radar-wrap { position: relative; width: 100%; height: 100%; display: flex; justify-content: center; align-items: center; }
.device-core { width: 50px; height: 50px; background: var(--cyan); border-radius: 10px; display: flex; justify-content: center; align-items: center; font-weight: bold; color: #000; z-index: 2; box-shadow: 0 0 20px var(--cyan); }
.shield-ring { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 80px; height: 80px; border: 2px solid var(--cyan); border-radius: 50%; opacity: 0; animation: radar-ping 2s infinite ease-out; }
.shield-ring:nth-child(2) { animation-delay: 1s; }
@keyframes radar-ping { 0% { width: 50px; height: 50px; opacity: 1; } 100% { width: 180px; height: 180px; opacity: 0; } }
.jam-source { position: absolute; top: 20%; right: 20%; color: var(--danger); font-size: 24px; animation: shake 0.5s infinite; }
@keyframes shake { 0%, 100% { transform: rotate(0); } 25% { transform: rotate(10deg); } 75% { transform: rotate(-10deg); } }

/* 痛点 2: 单线输出 */
.line-wrap { width: 100%; display: flex; align-items: center; justify-content: center; gap: 20px; }
.meshy { width: 50px; height: 50px; background: repeating-linear-gradient(45deg, #333, #333 5px, #111 5px, #111 10px); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--danger); font-weight: bold; border: 1px solid #444; }
.single-line { width: 80px; height: 3px; background: var(--cyan); position: relative; }
.single-line::after { content: 'NMEA 0183'; position: absolute; top: -20px; left: 50%; transform: translateX(-50%); font-size: 10px; color: var(--cyan); white-space: nowrap; font-weight: bold; }
.pulse-dot { position: absolute; width: 8px; height: 8px; background: #fff; border-radius: 50%; top: -2.5px; animation: move-right 1.5s infinite linear; box-shadow: 0 0 10px #fff; }
@keyframes move-right { 0% { left: 0; opacity: 1; } 100% { left: 100%; opacity: 0; } }

/* 痛点 3: 电池与功耗 */
.battery-wrap { display: flex; align-items: center; gap: 30px; }
.battery-icon { width: 36px; height: 70px; border: 3px solid var(--text-muted); border-radius: 6px; position: relative; padding: 4px; }
.battery-icon::before { content: ''; position: absolute; top: -8px; left: 8px; right: 8px; height: 4px; background: var(--text-muted); border-radius: 2px; }
.battery-fill { width: 100%; height: 100%; background: var(--cyan); border-radius: 2px; transform-origin: bottom; animation: drain 3s infinite alternate; }
@keyframes drain { 0%, 10% { transform: scaleY(1); } 90%, 100% { transform: scaleY(0.6); } }
.big-num { font-size: 32px; font-weight: 800; color: #fff; line-height: 1; }
.big-num span { font-size: 14px; color: var(--cyan); }

/* 痛点 4: 二次开发直方图 */
.dev-panel { width: 70%; background: #04101e; border: 1px solid #333; border-radius: 12px; padding: 15px; }
.bar-chart { display: flex; align-items: flex-end; justify-content: space-between; height: 50px; gap: 6px; }
.bar { flex: 1; background: var(--cyan); border-radius: 2px; opacity: 0.8; }
.bar:nth-child(1) { animation: jump 1s infinite alternate; }
.bar:nth-child(2) { animation: jump 1.3s infinite alternate 0.1s; }
.bar:nth-child(3) { animation: jump 0.8s infinite alternate 0.2s; }
.bar:nth-child(4) { animation: jump 1.5s infinite alternate 0.3s; }
.bar:nth-child(5) { animation: jump 1.1s infinite alternate 0.4s; }
@keyframes jump { 0% { height: 10%; opacity: 0.3; } 100% { height: 100%; opacity: 1; box-shadow: 0 0 10px var(--cyan); } }

/* 痛点 5: 验收 PASS */
.pass-wrap { position: relative; width: 90px; height: 90px; display: flex; justify-content: center; align-items: center; }
.pass-circle { width: 100%; height: 100%; border: 4px solid var(--cyan); border-radius: 50%; animation: stamp 2s infinite; display: flex; justify-content: center; align-items: center; transform: rotate(-15deg); }
.pass-text { color: var(--cyan); font-size: 22px; font-weight: 800; }
@keyframes stamp { 0% { transform: scale(2) rotate(-15deg); opacity: 0; } 20%, 80% { transform: scale(1) rotate(-15deg); opacity: 1; } 100% { transform: scale(1) rotate(-15deg); opacity: 0; } }

/* 痛点 6: 多系统卫星 */
.sat-wrap { position: relative; width: 100px; height: 100px; display: flex; justify-content: center; align-items: center; border: 1px dashed #555; border-radius: 50%; animation: spin 10s infinite linear; }
.sat-wrap::before { content: ''; position: absolute; width: 40px; height: 40px; background: var(--blue-800); border: 2px solid var(--cyan); border-radius: 50%; z-index: 2; box-shadow: inset 0 0 10px var(--cyan); }
.sat { position: absolute; width: 18px; height: 18px; background: var(--cyan); border-radius: 4px; top: -9px; font-size: 7px; font-weight: bold; color: #000; display: flex; justify-content: center; align-items: center; }
.sat.s2 { bottom: -9px; top: auto; background: #fff; animation: spin 10s infinite linear reverse; }
.sat.s3 { left: -9px; top: auto; background: #ffb84d; animation: spin 10s infinite linear; }
@keyframes spin { 100% { transform: rotate(360deg); } }

/* 痛点 7: 安装卡扣 */
.install-wrap { display: flex; gap: 20px; align-items: flex-end; height: 60px; }
.bracket { width: 30px; height: 50px; border: 2px dashed #444; border-radius: 4px; display: flex; justify-content: center; align-items: flex-end; padding-bottom: 5px; }
.bracket.active { border-color: var(--cyan); border-style: solid; background: rgba(53, 208, 255, 0.05); }
.tx-box { width: 24px; height: 24px; background: var(--cyan); border-radius: 4px; animation: drop-in 2s infinite; box-shadow: 0 0 10px var(--cyan); }
@keyframes drop-in { 0% { transform: translateY(-40px); opacity: 0; } 30%, 80% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(-40px); opacity: 0; } }

/* 痛点 8: 售后直连 */
.chat-wrap { display: flex; align-items: center; gap: 15px; }
.avatar { width: 36px; height: 36px; background: #333; border-radius: 50%; display: flex; justify-content: center; align-items: center; font-size: 10px; font-weight: bold; color: #fff; }
.avatar.eng { background: var(--cyan); color: #000; box-shadow: 0 0 15px var(--cyan); }
.chat-lines { display: flex; flex-direction: column; gap: 5px; width: 80px; }
.chat-bubble { height: 6px; background: #333; border-radius: 3px; }
.chat-bubble.cyan { background: var(--cyan); animation: type 1.5s infinite alternate; width: 60%; }
@keyframes type { 0% { width: 0; } 100% { width: 100%; } }

/* ===== Scenarios ===== */
.scenarios { background: var(--white); }
.scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.scenario-card { border-radius: var(--radius); overflow: hidden; background: var(--bg); box-shadow: var(--shadow); transition: all 0.3s ease; }
.scenario-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.scenario-card img { width: 100%; height: 280px; object-fit: cover; }
.scenario-body { padding: 1.6rem; }
.scenario-body h3 { font-size: 1.15rem; color: var(--blue-800); margin-bottom: 0.5rem; font-weight: 700; }
.scenario-body p { color: var(--muted); font-size: 0.92rem; }

/* ===== Contact ===== */
.contact { background: linear-gradient(160deg, var(--blue-900), var(--blue-700)); color: #fff; }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.contact-text .section-tag { color: var(--cyan); }
.contact-text h2 { color: #fff; font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 1rem; font-weight: 800; }
.contact-text > p { color: rgba(255, 255, 255, 0.75); margin-bottom: 2rem; }
.contact-list { list-style: none; }
.contact-list li { display: flex; justify-content: space-between; padding: 0.9rem 0; border-bottom: 1px solid rgba(255, 255, 255, 0.12); font-size: 0.95rem; gap: 1rem; }
.contact-list span { color: rgba(255, 255, 255, 0.6); }
.contact-list strong { color: #fff; font-weight: 600; text-align: end; word-break: break-word; } /* 修复：长邮箱不溢出 */

.contact-form { background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.14); border-radius: var(--radius); padding: 2rem; backdrop-filter: blur(8px); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.contact-form label { display: block; margin-bottom: 1rem; font-size: 0.88rem; color: rgba(255, 255, 255, 0.8); }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; margin-top: 0.4rem; padding: 0.7rem 0.9rem; border-radius: 8px; border: 1px solid rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.08); color: #fff; font-size: 0.92rem; font-family: inherit; outline: none; transition: border-color 0.2s; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--cyan); }
.contact-form option { color: #0d1b2a; }
.form-tip { margin-top: 0.8rem; font-size: 0.85rem; color: var(--cyan); min-height: 1.2em; }

/* ===== Footer ===== */
.footer { background: var(--blue-900); color: rgba(255, 255, 255, 0.6); padding: 2rem 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-brand { display: flex; align-items: center; gap: 0.6rem; color: #fff; font-weight: 600; }
.footer-brand img { width: 40px; height: 40px; }
.footer-copy { font-size: 0.85rem; }

/* ===== RTL ===== */
html[dir="rtl"] .nav-link.active::after { left: 0; right: 0; }

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .header-inner { flex-wrap: wrap; }
  .lang-switch { order: 3; }
}
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual img { max-width: 420px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .specs-layout { grid-template-columns: 1fr; }
  .specs-card { position: static; }
  .contact-inner { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  body { padding-bottom: 64px; } /* 修复：底部悬浮栏不再遮挡内容 */
  .floating-contact { right: 0; left: 0; bottom: 0; top: auto; transform: none; flex-direction: row; justify-content: center; background: rgba(6, 26, 51, 0.95); padding: 10px; gap: 20px; }
  html[dir="rtl"] .floating-contact { right: 0; left: 0; }
  .float-btn { width: 40px; height: 40px; box-shadow: none; }
  .nav { position: fixed; top: 76px; left: 0; right: 0; background: rgba(6, 26, 51, 0.98); flex-direction: column; gap: 0; padding: 1rem 0; transform: translateY(-150%); transition: transform 0.3s ease; z-index: 99; }
  .nav.open { transform: translateY(0); }
  .nav-link { padding: 0.9rem 2rem; width: 100%; }
  .nav-link.active::after { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding-top: 100px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 70px 0; }
  .scenario-card img { height: 200px; }
  .lang-switch { order: 4; }
}
.contact-direct h3 {
  font-weight: 700;
}
.contact-direct .btn-block {
  display: flex;
  align-items: center;
  justify-content: center;
} /* 修复：补上缺失的右括号 */